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Change-Id: I126075a330f305c85f8fe1b8c9d408f368be95d1
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into lineage-20
7d11b1a7a11c Revert "sched: cpufreq: Use sched_clock instead of rq_clock when updating schedutil"
daaa5da96a74 sched: Take irq_sparse lock during the isolation
217ab2d0ef91 rcu: Speed up calling of RCU tasks callbacks
997b726bc092 kernel: power: Workaround for sensor ipc message causing high power consume
b933e4d37bc0 sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
82d3f23d6dc5 sched/fair: Fix bandwidth timer clock drift condition
629bfed360f9 kernel: power: qos: remove check for core isolation while cluster LPMs
891a63210e1d sched/fair: Fix issue where frequency update not skipped
b775cb29f663 ANDROID: Move schedtune en/dequeue before schedutil update triggers
ebdb82f7b34a sched/fair: Skip frequency updates if CPU about to idle
ff383d94478a FROMLIST: sched: Make iowait_boost optional in schedutil
9539942cb065 FROMLIST: cpufreq: Make iowait boost a policy option
b65c91c9aa14 ARM: dts: msm: add HW CPU's busy-cost-data for additional freqs
72f13941085b ARM: dts: msm: fix CPU's idle-cost-data
ab88411382f7 ARM: dts: msm: fix EM to be monotonically increasing
83dcbae14782 ARM: dts: msm: Fix EAS idle-cost-data property length
33d3b17bfdfb ARM: dts: msm: Add msm8998 energy model
c0fa7577022c sched/walt: Re-add code to allow WALT to function
d5cd35f38616 FROMGIT: binder: use EINTR for interrupted wait for work
db74739c86de sched: Don't fail isolation request for an already isolated CPU
aee7a16e347b sched: WALT: increase WALT minimum window size to 20ms
4dbe44554792 sched: cpufreq: Use per_cpu_ptr instead of this_cpu_ptr when reporting load
ef3fb04c7df4 sched: cpufreq: Use sched_clock instead of rq_clock when updating schedutil
c7128748614a sched/cpupri: Exclude isolated CPUs from the lowest_mask
6adb092856e8 sched: cpufreq: Limit governor updates to WALT changes alone
0fa652ee00f5 sched: walt: Correct WALT window size initialization
41cbb7bc59fb sched: walt: fix window misalignment when HZ=300
43cbf9d6153d sched/tune: Increase the cgroup limit to 6
c71b8fffe6b3 drivers: cpuidle: lpm-levels: Fix KW issues with idle state idx < 0
938e42ca699f drivers: cpuidle: lpm-levels: Correctly check for list empty
8d8a48aecde5 sched/fair: Fix load_balance() affinity redo path
eccc8acbe705 sched/fair: Avoid unnecessary active load balance
0ffdb886996b BACKPORT: sched/core: Fix rules for running on online && !active CPUs
c9999f04236e sched/core: Allow kthreads to fall back to online && !active cpus
b9b6bc6ea3c0 sched: Allow migrating kthreads into online but inactive CPUs
a9314f9d8ad4 sched/fair: Allow load bigger task load balance when nr_running is 2
c0b317c27d44 pinctrl: qcom: Clear status bit on irq_unmask
45df1516d04a UPSTREAM: mm: fix misplaced unlock_page in do_wp_page()
899def5edcd4 UPSTREAM: mm/ksm: Remove reuse_ksm_page()
46c6fbdd185a BACKPORT: mm: do_wp_page() simplification
90dccbae4c04 UPSTREAM: mm: reuse only-pte-mapped KSM page in do_wp_page()
ebf270d24640 sched/fair: vruntime should normalize when switching from fair
cbe0b37059c9 mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct
12d40f1995b4 msm: mdss: Fix indentation
620df03a7229 msm: mdss: Treat polling_en as the bool that it is
12af218146a6 msm: mdss: add idle state node
13e661759656 cpuset: Restore tasks affinity while moving across cpusets
602bf4096dab genirq: Honour IRQ's affinity hint during migration
9209b5556f6a power: qos: Use effective affinity mask
f31078b5825f genirq: Introduce effective affinity mask
58c453484f7e sched/cputime: Mitigate performance regression in times()/clock_gettime()
400383059868 kernel: time: Add delay after cpu_relax() in tight loops
1daa7ea39076 pinctrl: qcom: Update irq handle for GPIO pins
07f7c9961c7c power: smb-lib: Fix mutex acquisition deadlock on PD hard reset
094b738f46c8 power: qpnp-smb2: Implement battery charging_enabled node
d6038d6da57f ASoC: msm-pcm-q6-v2: Add dsp buf check
0d7a6c301af8 qcacld-3.0: Fix OOB in wma_scan_roam.c
Change-Id: Ia2e189e37daad6e99bdb359d1204d9133a7916f4
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schedutil"
That commit should have changed rq_clock to sched_clock, instead
of sched_ktime_clock, which kept schedutil from making correct
decisions.
This reverts commit ef3fb04c7df43dfa1793e33f764a2581cda96310.
Change-Id: Id4118894388c33bf2b2d3d5ee27eb35e82dc4a96
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irq_migrate_all_off_this_cpu() is used to migrate IRQs and this
function checks for all active irq in the allocated_irqs mask.
irq_migrate_all_off_this_cpu() expects the caller to take irq_sparse
lock to avoid race conditions while accessing allocated_irqs
mask variable. Prevent a race between irq alloc/free and irq
migration by adding irq_sparse lock across CPU isolation.
Change-Id: I9edece1ecea45297c8f6529952d88b3133046467
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
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cpu-local slices
commit de53fd7aedb100f03e5d2231cfce0e4993282425 upstream.
It has been observed, that highly-threaded, non-cpu-bound applications
running under cpu.cfs_quota_us constraints can hit a high percentage of
periods throttled while simultaneously not consuming the allocated
amount of quota. This use case is typical of user-interactive non-cpu
bound applications, such as those running in kubernetes or mesos when
run on multiple cpu cores.
This has been root caused to cpu-local run queue being allocated per cpu
bandwidth slices, and then not fully using that slice within the period.
At which point the slice and quota expires. This expiration of unused
slice results in applications not being able to utilize the quota for
which they are allocated.
The non-expiration of per-cpu slices was recently fixed by
'commit 512ac999d275 ("sched/fair: Fix bandwidth timer clock drift
condition")'. Prior to that it appears that this had been broken since
at least 'commit 51f2176d74ac ("sched/fair: Fix unlocked reads of some
cfs_b->quota/period")' which was introduced in v3.16-rc1 in 2014. That
added the following conditional which resulted in slices never being
expired.
if (cfs_rq->runtime_expires != cfs_b->runtime_expires) {
/* extend local deadline, drift is bounded above by 2 ticks */
cfs_rq->runtime_expires += TICK_NSEC;
Because this was broken for nearly 5 years, and has recently been fixed
and is now being noticed by many users running kubernetes
(https://github.com/kubernetes/kubernetes/issues/67577) it is my opinion
that the mechanisms around expiring runtime should be removed
altogether.
This allows quota already allocated to per-cpu run-queues to live longer
than the period boundary. This allows threads on runqueues that do not
use much CPU to continue to use their remaining slice over a longer
period of time than cpu.cfs_period_us. However, this helps prevent the
above condition of hitting throttling while also not fully utilizing
your cpu quota.
This theoretically allows a machine to use slightly more than its
allotted quota in some periods. This overflow would be bounded by the
remaining quota left on each per-cpu runqueueu. This is typically no
more than min_cfs_rq_runtime=1ms per cpu. For CPU bound tasks this will
change nothing, as they should theoretically fully utilize all of their
quota in each period. For user-interactive tasks as described above this
provides a much better user/application experience as their cpu
utilization will more closely match the amount they requested when they
hit throttling. This means that cpu limits no longer strictly apply per
period for non-cpu bound applications, but that they are still accurate
over longer timeframes.
This greatly improves performance of high-thread-count, non-cpu bound
applications with low cfs_quota_us allocation on high-core-count
machines. In the case of an artificial testcase (10ms/100ms of quota on
80 CPU machine), this commit resulted in almost 30x performance
improvement, while still maintaining correct cpu quota restrictions.
That testcase is available at https://github.com/indeedeng/fibtest.
Fixes: 512ac999d275 ("sched/fair: Fix bandwidth timer clock drift condition")
Change-Id: I7d7a39fb554ec0c31f9381f492165f43c70b3924
Signed-off-by: Dave Chiluk <chiluk+linux@indeed.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: John Hammond <jhammond@indeed.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kyle Anderson <kwa@yelp.com>
Cc: Gabriel Munos <gmunoz@netflix.com>
Cc: Peter Oskolkov <posk@posk.io>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Brendan Gregg <bgregg@netflix.com>
Link: https://lkml.kernel.org/r/1563900266-19734-2-git-send-email-chiluk+linux@indeed.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 512ac999d2755d2b7109e996a76b6fb8b888631d upstream.
I noticed that cgroup task groups constantly get throttled even
if they have low CPU usage, this causes some jitters on the response
time to some of our business containers when enabling CPU quotas.
It's very simple to reproduce:
mkdir /sys/fs/cgroup/cpu/test
cd /sys/fs/cgroup/cpu/test
echo 100000 > cpu.cfs_quota_us
echo $$ > tasks
then repeat:
cat cpu.stat | grep nr_throttled # nr_throttled will increase steadily
After some analysis, we found that cfs_rq::runtime_remaining will
be cleared by expire_cfs_rq_runtime() due to two equal but stale
"cfs_{b|q}->runtime_expires" after period timer is re-armed.
The current condition to judge clock drift in expire_cfs_rq_runtime()
is wrong, the two runtime_expires are actually the same when clock
drift happens, so this condtion can never hit. The orginal design was
correctly done by this commit:
a9cf55b28610 ("sched: Expire invalid runtime")
... but was changed to be the current implementation due to its locking bug.
This patch introduces another way, it adds a new field in both structures
cfs_rq and cfs_bandwidth to record the expiration update sequence, and
uses them to figure out if clock drift happens (true if they are equal).
Change-Id: I8168fe3b45785643536f289ea823d1a62d9d8ab2
Signed-off-by: Xunlei Pang <xlpang@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[alakeshh: backport: Fixed merge conflicts:
- sched.h: Fix the indentation and order in which the variables are
declared to match with coding style of the existing code in 4.14
Struct members of same type were declared in separate lines in
upstream patch which has been changed back to having multiple
members of same type in the same line.
e.g. int a; int b; -> int a, b; ]
Signed-off-by: Alakesh Haloi <alakeshh@amazon.com>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org> # 4.14.x
Fixes: 51f2176d74ac ("sched/fair: Fix unlocked reads of some cfs_b->quota/period")
Link: http://lkml.kernel.org/r/20180620101834.24455-1-xlpang@linux.alibaba.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch fixes one of the infrequent conditions in
commit 54b6baeca500 ("sched/fair: Skip frequency updates if CPU about to idle")
where we could have skipped a frequency update. The fix is to use the
correct flag which skips freq updates.
Note that this is a rare issue (can show up only during CFS throttling)
and even then we just do an additional frequency update which we were
doing anyway before the above patch.
Bug: 64689959
Change-Id: I0117442f395cea932ad56617065151bdeb9a3b53
Signed-off-by: Joel Fernandes <joelaf@google.com>
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CPU rq util updates happen when rq signals are updated as part of
enqueue and dequeue operations. Doing these updates triggers a call to
the registered util update handler, which takes schedtune boosting
into account. Enqueueing the task in the correct schedtune group after
this happens means that we will potentially not see the boost for an
entire throttle period.
Move the enqueue/dequeue operations for schedtune before the signal
updates which can trigger OPP changes.
Change-Id: I4236e6b194bc5daad32ff33067d4be1987996780
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
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If CPU is about to idle, prevent a frequency update. With the number of
schedutil governor wake ups are reduced by more than half on a test
playing bluetooth audio.
Test: sugov wake ups drop by more than half when playing music with
screen off (476 / 1092)
Bug: 64689959
Change-Id: I400026557b4134c0ac77f51c79610a96eb985b4a
Signed-off-by: Joel Fernandes <joelaf@google.com>
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We should apply the iowait boost only if cpufreq policy has iowait boost
enabled. Also make it a schedutil configuration from sysfs so it can be
turned on/off if needed (by default initialize it to the policy value).
For systems that don't need/want it enabled, such as those on arm64
based mobile devices that are battery operated, it saves energy when the
cpufreq driver policy doesn't have it enabled (details below):
Here are some results for energy measurements collected running a
YouTube video for 30 seconds:
Before: 8.042533 mWh
After: 7.948377 mWh
Energy savings is ~1.2%
Bug: 38010527
Link: https://lkml.org/lkml/2017/5/19/42
Change-Id: If124076ad0c16ade369253840dedfbf870aff927
Signed-off-by: Joel Fernandes <joelaf@google.com>
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Change-Id: Ieb1067c5e276f872ed4c722b7d1fabecbdad87e7
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When isolating a CPU, a check is performed to see if there is
only 1 active CPU in the system. If that is the case, the
CPU is not isolated. However this check is done before testing
if the requested CPU is already isolated or not. If the
requested CPU is already isolated, there is no need to fail
the isolation even when there is only 1 active CPU in the system.
For example, 0-6 CPUs are isolated on a 8 CPU machine. When
an isolation request comes for CPU6, which is already isolated,
the current code fail the requesting thinking we end up
with no active CPU in the system.
Change-Id: I28fea4ff67ffed82465e5cfa785414069e4a180a
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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Increase WALT minimum window size to 20ms. 10ms isn't large enough
capture workload's pattern.
[beykerykt}: Adapt for HMP
Change-Id: I4d69577fbfeac2bc23db4ff414939cc51ada30d6
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
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We need cpufreq_update_util to report load for the CPU corresponding
to the rq that is passed in as an argument, rather than the CPU executing
cpufreq_update_util.
Change-Id: I8473f230d40928d5920c614760e96fef12745d5a
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
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rq_clock may not be updated often enough for schedutil or other
cpufreq governors to work correctly when it's passed as the
timestamp for a load report. Use sched_clock instead.
[beykerykt]: Switch to sched_ktime_clock()
Change-Id: I745b727870a31da25f766c2c2f37527f568c20da
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
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The cpupri_find() returns the candidate CPUs which are running
lower priority than the waking RT task in the lowest_mask. This
contains isolated CPUs as well. Since the energy aware CPU selection
skips isolated CPUs, no target CPU may be found if all unisolated CPUs
are running higher priority RT tasks. In which case, we fallback to
the default CPU selection algorithm and returns an isolated CPU. This
decision is reversed by select_task_rq() and returns an unisolated
CPU that is busy with other RT tasks. This RT task packing is desired
behavior. However, RT push mechanism pushes the packed RT task to
an isolated CPU. This can be avoided by excluding isolated CPUs from
the lowest_mask returned by cpupri_find().
Change-Id: I75486b3935caf496a638d0333565beffc47fe249
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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It's not necessary to keep reporting load to the governor
if it doesn't change in a window. Limit updates to when
we expect load changes - after window rollover and when
we send updates related to intercluster migrations.
[beykerykt]: Adapt for HMP
Change-Id: I3232d40f3d54b0b81cfafdcdb99b534df79327bf
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
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It is preferable that WALT window rollover occurs just
before a tick, since the tick is an opportune moment
to record a complete window's statistics, as well as report
those stats to the cpu frequency governor. When CONFIG_HZ
results in a TICK_NSEC that isn't a integral number, this
requirement may be violated. Account for this by reducing
the WALT window size to the nearest multiple of TICK_NSEC.
Commit d368c6faa19b ("sched: walt: fix window misalignment
when HZ=300") attempted to do this but WALT isn't using
MIN_SCHED_RAVG_WINDOW as the window size and the patch was
doing nothing.
Also, change the type of 'walt_disabled' to bool and warn
if an invalid window size causes WALT to be disabled.
[beykerykt]: Adapt for HMP
Change-Id: Ie3dcfc21a3df4408254ca1165a355bbe391ed5c7
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
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Due to rounding error hrtimer tick interval becomes 3333333 ns when HZ=300.
Consequently the tick time stamp nearest to the WALT's default window size
20ms will be also 19999998 (3333333 * 6).
[beykerykt]: Adapt for HMP
Change-Id: I08f9bd2dbecccbb683e4490d06d8b0da703d3ab2
Suggested-by: Joel Fernandes <joelaf@google.com>
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
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The schedtune cgroup controller allows upto 5 cgroups including the
default/root cgroup. Until now the user space is creating only
4 additional cgroups namely, foreground, background, top-app and
audio-app. Recently another cgroup called rt is created before
the audio-app cgroup. Since kernel limits the cgroups to 5, the
creation of audio-app cgroup is failing. Fix this by increasing
the schedtune cgroup controller cgroup limit to 6.
Change-Id: I13252a90dba9b8010324eda29b8901cb0b20bc21
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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If load_balance() fails to migrate any tasks because all tasks were
affined, load_balance() removes the source cpu from consideration and
attempts to redo and balance among the new subset of cpus.
There is a bug in this code path where the algorithm considers all active
cpus in the system (minus the source that was just masked out). This is
not valid for two reasons: some active cpus may not be in the current
scheduling domain and one of the active cpus is dst_cpu. These cpus should
not be considered, as we cannot pull load from them.
Instead of failing out of load_balance(), we may end up redoing the search
with no valid cpus and incorrectly concluding the domain is balanced.
Additionally, if the group_imbalance flag was just set, it may also be
incorrectly unset, thus the flag will not be seen by other cpus in future
load_balance() runs as that algorithm intends.
Fix the check by removing cpus not in the current domain and the dst_cpu
from considertation, thus limiting the evaluation to valid remaining cpus
from which load might be migrated.
Co-authored-by: Austin Christ <austinwc@codeaurora.org>
Co-authored-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Tested-by: Tyler Baicar <tbaicar@codeaurora.org>
Change-Id: Ife6701c9c62e7155493d9db9398f08c4474e94b3
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When find busiest group, it will avoid load balance if
it is only 1 task running on src cpu. Consider race when
different cpus do newly idle load balance at the same time,
check src cpu nr_running to avoid unnecessary active load
balance again.
See the race condition example here:
1) cpu2 have 2 tasks, so cpu2 rq->nr_running == 2 and cfs.h_nr_running
==2.
2) cpu4 and cpu5 doing newly idle load balance at the same time.
3) cpu4 and cpu5 both see cpu2 sched_load_balance_sg_stats sum_nr_run=2
so they are both see cpu2 as the busiest rq.
4) cpu5 did a success migration task from cpu2, so cpu2 only have 1 task
left, cpu2 rq->nr_running == 1 and cfs.h_nr_running ==1.
5) cpu4 surely goes to no_move because currently cpu4 only have 1 task
which is currently running.
6) and then cpu4 goes here to check if cpu2 need active load balance.
Change-Id: Ia9539a43e9769c4936f06ecfcc11864984c50c29
Signed-off-by: Maria Yu <aiquny@codeaurora.org>
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As already enforced by the WARN() in __set_cpus_allowed_ptr(), the rules
for running on an online && !active CPU are stricter than just being a
kthread, you need to be a per-cpu kthread.
If you're not strictly per-CPU, you have better CPUs to run on and
don't need the partially booted one to get your work done.
The exception is to allow smpboot threads to bootstrap the CPU itself
and get kernel 'services' initialized before we allow userspace on it.
Change-Id: I515e873a6e5be0cde7771ecedf56101614300fe2
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 955dbdf4ce87 ("sched: Allow migrating kthreads into online but inactive CPUs")
Link: http://lkml.kernel.org/r/20170725165821.cejhb7v2s3kecems@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Backported to 4.4
Signed-off-by: joshuous <joshuous@gmail.com>
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During CPU hotplug, CPU_ONLINE callbacks are run while the CPU is
online but not active. A CPU_ONLINE callback may create or bind a
kthread so that its cpus_allowed mask only allows the CPU which is
being brought online. The kthread may start executing before the CPU
is made active and can end up in select_fallback_rq().
In such cases, the expected behavior is selecting the CPU which is
coming online; however, because select_fallback_rq() only chooses from
active CPUs, it determines that the task doesn't have any viable CPU
in its allowed mask and ends up overriding it to cpu_possible_mask.
CPU_ONLINE callbacks should be able to put kthreads on the CPU which
is coming online. Update select_fallback_rq() so that it follows
cpu_online() rather than cpu_active() for kthreads.
Reported-by: Gautham R Shenoy <ego@linux.vnet.ibm.com>
Tested-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Change-Id: I562dcc53717b1f2f8324abffb652b91592ba8d5c
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-team@fb.com
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20160616193504.GB3262@mtj.duckdns.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Per-cpu workqueues have been tripping CPU affinity sanity checks while
a CPU is being offlined. A per-cpu kworker ends up running on a CPU
which isn't its target CPU while the CPU is online but inactive.
While the scheduler allows kthreads to wake up on an online but
inactive CPU, it doesn't allow a running kthread to be migrated to
such a CPU, which leads to an odd situation where setting affinity on
a sleeping and running kthread leads to different results.
Each mem-reclaim workqueue has one rescuer which guarantees forward
progress and the rescuer needs to bind itself to the CPU which needs
help in making forward progress; however, due to the above issue,
while set_cpus_allowed_ptr() succeeds, the rescuer doesn't end up on
the correct CPU if the CPU is in the process of going offline,
tripping the sanity check and executing the work item on the wrong
CPU.
This patch updates __migrate_task() so that kthreads can be migrated
into an inactive but online CPU.
Change-Id: I38cc3eb3b2ec5b7034cc72a2bcdd32a549314915
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
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When there is only 2 tasks in 1 cpu and the other
task is currently running, allow load bigger task
to be balanced if the other task is currently
running.
Change-Id: I489e9624ba010f9293272a67585e8209a786b787
Signed-off-by: Maria Yu <aiquny@codeaurora.org>
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fair
When rt_mutex_setprio changes a task's scheduling class to RT,
we're seeing cases where the task's vruntime is not updated
correctly upon return to the fair class.
Specifically, the following is being observed:
- task is deactivated while still in the fair class
- task is boosted to RT via rt_mutex_setprio, which changes
the task to RT and calls check_class_changed.
- check_class_changed leads to detach_task_cfs_rq, at which point
the vruntime_normalized check sees that the task's state is TASK_WAKING,
which results in skipping the subtraction of the rq's min_vruntime
from the task's vruntime
- later, when the prio is deboosted and the task is moved back
to the fair class, the fair rq's min_vruntime is added to
the task's vruntime, even though it wasn't subtracted earlier.
The immediate result is inflation of the task's vruntime, giving
it lower priority (starving it if there's enough available work).
The longer-term effect is inflation of all vruntimes because the
task's vruntime becomes the rq's min_vruntime when the higher
priority tasks go idle. That leads to a vicious cycle, where
the vruntime inflation repeatedly doubled.
The change here is to detect when vruntime_normalized is being
called when the task is waking but is waking in another class,
and to conclude that this is a case where vruntime has not
been normalized.
Bug: 80502612
Change-Id: If0bb02eb16939ca5e91ef282b7f9119ff68622c4
Signed-off-by: John Dias <joaodias@google.com>
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When tasks move across cpusets, the current affinity settings
are lost. Cache the task affinity and restore it during cpuset
migration. The restoring happens only when the cached affinity
is subset of the current cpuset settings.
Change-Id: I6c2ec1d5e3d994e176926d94b9e0cc92418020cc
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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Commit:
6e998916dfe3 ("sched/cputime: Fix clock_nanosleep()/clock_gettime() inconsistency")
fixed a problem whereby clock_nanosleep() followed by clock_gettime() could
allow a task to wake early. It addressed the problem by calling the scheduling
classes update_curr() when the cputimer starts.
Said change induced a considerable performance regression on the syscalls
times() and clock_gettimes(CLOCK_PROCESS_CPUTIME_ID). There are some
debuggers and applications that monitor their own performance that
accidentally depend on the performance of these specific calls.
This patch mitigates the performace loss by prefetching data in the CPU
cache, as stalls due to cache misses appear to be where most time is spent
in our benchmarks.
Here are the performance gain of this patch over v4.7-rc7 on a Sandy Bridge
box with 32 logical cores and 2 NUMA nodes. The test is repeated with a
variable number of threads, from 2 to 4*num_cpus; the results are in
seconds and correspond to the average of 10 runs; the percentage gain is
computed with (before-after)/before so a positive value is an improvement
(it's faster). The improvement varies between a few percents for 5-20
threads and more than 10% for 2 or >20 threads.
pound_clock_gettime:
threads 4.7-rc7 patched 4.7-rc7
[num] [secs] [secs (percent)]
2 3.48 3.06 ( 11.83%)
5 3.33 3.25 ( 2.40%)
8 3.37 3.26 ( 3.30%)
12 3.32 3.37 ( -1.60%)
21 4.01 3.90 ( 2.74%)
30 3.63 3.36 ( 7.41%)
48 3.71 3.11 ( 16.27%)
79 3.75 3.16 ( 15.74%)
110 3.81 3.25 ( 14.80%)
128 3.88 3.31 ( 14.76%)
pound_times:
threads 4.7-rc7 patched 4.7-rc7
[num] [secs] [secs (percent)]
2 3.65 3.25 ( 11.03%)
5 3.45 3.17 ( 7.92%)
8 3.52 3.22 ( 8.69%)
12 3.29 3.36 ( -2.04%)
21 4.07 3.92 ( 3.78%)
30 3.87 3.40 ( 12.17%)
48 3.79 3.16 ( 16.61%)
79 3.88 3.28 ( 15.42%)
110 3.90 3.38 ( 13.35%)
128 4.00 3.38 ( 15.45%)
pound_clock_gettime and pound_clock_gettime are two benchmarks included in
the MMTests framework. They launch a given number of threads which
repeatedly call times() or clock_gettimes(). The results above can be
reproduced with cloning MMTests from github.com and running the "poundtime"
workload:
$ git clone https://github.com/gormanm/mmtests.git
$ cd mmtests
$ cp configs/config-global-dhp__workload_poundtime config
$ ./run-mmtests.sh --run-monitor $(uname -r)
The above will run "poundtime" measuring the kernel currently running on
the machine; Once a new kernel is installed and the machine rebooted,
running again
$ cd mmtests
$ ./run-mmtests.sh --run-monitor $(uname -r)
will produce results to compare with. A comparison table will be output
with:
$ cd mmtests/work/log
$ ../../compare-kernels.sh
the table will contain a lot of entries; grepping for "Amean" (as in
"arithmetic mean") will give the tables presented above. The source code
for the two benchmarks is reported at the end of this changelog for
clairity.
The cache misses addressed by this patch were found using a combination of
`perf top`, `perf record` and `perf annotate`. The incriminated lines were
found to be
struct sched_entity *curr = cfs_rq->curr;
and
delta_exec = now - curr->exec_start;
in the function update_curr() from kernel/sched/fair.c. This patch
prefetches the data from memory just before update_curr is called in the
interested execution path.
A comparison of the total number of cycles before and after the patch
follows; the data is obtained using `perf stat -r 10 -ddd <program>`
running over the same sequence of number of threads used above (a positive
gain is an improvement):
threads cycles before cycles after gain
2 19,699,563,964 +-1.19% 17,358,917,517 +-1.85% 11.88%
5 47,401,089,566 +-2.96% 45,103,730,829 +-0.97% 4.85%
8 80,923,501,004 +-3.01% 71,419,385,977 +-0.77% 11.74%
12 112,326,485,473 +-0.47% 110,371,524,403 +-0.47% 1.74%
21 193,455,574,299 +-0.72% 180,120,667,904 +-0.36% 6.89%
30 315,073,519,013 +-1.64% 271,222,225,950 +-1.29% 13.92%
48 321,969,515,332 +-1.48% 273,353,977,321 +-1.16% 15.10%
79 337,866,003,422 +-0.97% 289,462,481,538 +-1.05% 14.33%
110 338,712,691,920 +-0.78% 290,574,233,170 +-0.77% 14.21%
128 348,384,794,006 +-0.50% 292,691,648,206 +-0.66% 15.99%
A comparison of cache miss vs total cache loads ratios, before and after
the patch (again from the `perf stat -r 10 -ddd <program>` tables):
threads L1 misses/total*100 L1 misses/total*100 gain
before after
2 7.43 +-4.90% 7.36 +-4.70% 0.94%
5 13.09 +-4.74% 13.52 +-3.73% -3.28%
8 13.79 +-5.61% 12.90 +-3.27% 6.45%
12 11.57 +-2.44% 8.71 +-1.40% 24.72%
21 12.39 +-3.92% 9.97 +-1.84% 19.53%
30 13.91 +-2.53% 11.73 +-2.28% 15.67%
48 13.71 +-1.59% 12.32 +-1.97% 10.14%
79 14.44 +-0.66% 13.40 +-1.06% 7.20%
110 15.86 +-0.50% 14.46 +-0.59% 8.83%
128 16.51 +-0.32% 15.06 +-0.78% 8.78%
As a final note, the following shows the evolution of performance figures
in the "poundtime" benchmark and pinpoints commit 6e998916dfe3
("sched/cputime: Fix clock_nanosleep()/clock_gettime() inconsistency") as a
major source of degradation, mostly unaddressed to this day (figures
expressed in seconds).
pound_clock_gettime:
threads parent of 6e998916dfe3 4.7-rc7
6e998916dfe3 itself
2 2.23 3.68 ( -64.56%) 3.48 (-55.48%)
5 2.83 3.78 ( -33.42%) 3.33 (-17.43%)
8 2.84 4.31 ( -52.12%) 3.37 (-18.76%)
12 3.09 3.61 ( -16.74%) 3.32 ( -7.17%)
21 3.14 4.63 ( -47.36%) 4.01 (-27.71%)
30 3.28 5.75 ( -75.37%) 3.63 (-10.80%)
48 3.02 6.05 (-100.56%) 3.71 (-22.99%)
79 2.88 6.30 (-118.90%) 3.75 (-30.26%)
110 2.95 6.46 (-119.00%) 3.81 (-29.24%)
128 3.05 6.42 (-110.08%) 3.88 (-27.04%)
pound_times:
threads parent of 6e998916dfe3 4.7-rc7
6e998916dfe3 itself
2 2.27 3.73 ( -64.71%) 3.65 (-61.14%)
5 2.78 3.77 ( -35.56%) 3.45 (-23.98%)
8 2.79 4.41 ( -57.71%) 3.52 (-26.05%)
12 3.02 3.56 ( -17.94%) 3.29 ( -9.08%)
21 3.10 4.61 ( -48.74%) 4.07 (-31.34%)
30 3.33 5.75 ( -72.53%) 3.87 (-16.01%)
48 2.96 6.06 (-105.04%) 3.79 (-28.10%)
79 2.88 6.24 (-116.83%) 3.88 (-34.81%)
110 2.98 6.37 (-114.08%) 3.90 (-31.12%)
128 3.10 6.35 (-104.61%) 4.00 (-28.87%)
The source code of the two benchmarks follows. To compile the two:
NR_THREADS=42
for FILE in pound_times pound_clock_gettime; do
gcc -lrt -O2 -lpthread -DNUM_THREADS=$NR_THREADS $FILE.c -o $FILE
done
==== BEGIN pound_times.c ====
struct tms start;
void *pound (void *threadid)
{
struct tms end;
int oldutime = 0;
int utime;
int i;
for (i = 0; i < 5000000 / NUM_THREADS; i++) {
times(&end);
utime = ((int)end.tms_utime - (int)start.tms_utime);
if (oldutime > utime) {
printf("utime decreased, was %d, now %d!\n", oldutime, utime);
}
oldutime = utime;
}
pthread_exit(NULL);
}
int main()
{
pthread_t th[NUM_THREADS];
long i;
times(&start);
for (i = 0; i < NUM_THREADS; i++) {
pthread_create (&th[i], NULL, pound, (void *)i);
}
pthread_exit(NULL);
return 0;
}
==== END pound_times.c ====
==== BEGIN pound_clock_gettime.c ====
void *pound (void *threadid)
{
struct timespec ts;
int rc, i;
unsigned long prev = 0, this = 0;
for (i = 0; i < 5000000 / NUM_THREADS; i++) {
rc = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
if (rc < 0)
perror("clock_gettime");
this = (ts.tv_sec * 1000000000) + ts.tv_nsec;
if (0 && this < prev)
printf("%lu ns timewarp at iteration %d\n", prev - this, i);
prev = this;
}
pthread_exit(NULL);
}
int main()
{
pthread_t th[NUM_THREADS];
long rc, i;
pid_t pgid;
for (i = 0; i < NUM_THREADS; i++) {
rc = pthread_create(&th[i], NULL, pound, (void *)i);
if (rc < 0)
perror("pthread_create");
}
pthread_exit(NULL);
return 0;
}
==== END pound_clock_gettime.c ====
Suggested-by: Mike Galbraith <mgalbraith@suse.de>
Change-Id: Iad82d9f31c92e50e1e3b1339892512526ceb0acf
Signed-off-by: Giovanni Gherdovich <ggherdovich@suse.cz>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1470385316-15027-2-git-send-email-ggherdovich@suse.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This patch is no longer necessary because we no longer ship
su add-ons, which is this patch initially designed for. Now
it causes another issue which breaks custom root solution
such as Magisk, as Magisk switches worker tmpfs dir to RO
instead of RW for safety reasons and happens to satisfy
MS_RDONLY check for su file, resulting in su file totally
inaccessible.
This reverts commit 08ff8a2e58eb226015fa68d577121137a7e0953f.
Change-Id: If25a9ef7e64c79412948f4619e08faaedb18aa13
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When sched_feat(NONTASK_CAPACITY) evaluates to a constant at compile time,
Clang is unhappy. Use a double negation to make the constant boolean so
that Clang is happy.
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
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It has been claimed that the PG implementation of 'su' has security
vulnerabilities even when disabled. Unfortunately, the people that
find these vulnerabilities often like to keep them private so they
can profit from exploits while leaving users exposed to malicious
hackers.
In order to reduce the attack surface for vulnerabilites, it is
therefore necessary to make 'su' completely inaccessible when it
is not in use (except by the root and system users).
Change-Id: I79716c72f74d0b7af34ec3a8054896c6559a181d
Signed-off-by: Davide Garberi <dade.garberi@gmail.com>
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cgroup_path() and friends used to format the path from the end and
thus the resulting path usually didn't start at the start of the
passed in buffer. Also, when the buffer was too small, the partial
result was truncated from the head rather than tail and there was no
way to tell how long the full path would be. These make the functions
less robust and more awkward to use.
With recent updates to kernfs_path(), cgroup_path() and friends can be
made to behave in strlcpy() style.
* cgroup_path(), cgroup_path_ns[_locked]() and task_cgroup_path() now
always return the length of the full path. If buffer is too small,
it contains nul terminated truncated output.
* All users updated accordingly.
v2: cgroup_path() usage in kernel/sched/debug.c converted.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Change-Id: Ibb5c7544237e0ab6cde03c8bec80b3376917c0a8
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Now that nobody use the "priv" arg passed to can_fork/cancel_fork/fork we can
kill CGROUP_CANFORK_COUNT/SUBSYS_TAG/etc and cgrp_ss_priv[] in copy_process().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Chatur27 <jasonbright2709@gmail.com>
Change-Id: I3d38130a199fa07b43aac95c201aecd9924e0879
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lineage-18.1-caf-msm8998
* common/android-4.4-p:
Linux 4.4.296
xen/netback: don't queue unlimited number of packages
xen/console: harden hvc_xen against event channel storms
xen/netfront: harden netfront against event channel storms
xen/blkfront: harden blkfront against event channel storms
Input: touchscreen - avoid bitwise vs logical OR warning
ARM: 8805/2: remove unneeded naked function usage
net: lan78xx: Avoid unnecessary self assignment
net: systemport: Add global locking for descriptor lifecycle
timekeeping: Really make sure wall_to_monotonic isn't positive
USB: serial: option: add Telit FN990 compositions
PCI/MSI: Clear PCI_MSIX_FLAGS_MASKALL on error
USB: gadget: bRequestType is a bitfield, not a enum
igbvf: fix double free in `igbvf_probe`
soc/tegra: fuse: Fix bitwise vs. logical OR warning
nfsd: fix use-after-free due to delegation race
dm btree remove: fix use after free in rebalance_children()
recordmcount.pl: look for jgnop instruction as well as bcrl on s390
mac80211: send ADDBA requests using the tid/queue of the aggregation session
hwmon: (dell-smm) Fix warning on /proc/i8k creation error
net: netlink: af_netlink: Prevent empty skb by adding a check on len.
i2c: rk3x: Handle a spurious start completion interrupt flag
parisc/agp: Annotate parisc agp init functions with __init
nfc: fix segfault in nfc_genl_dump_devices_done
FROMGIT: USB: gadget: bRequestType is a bitfield, not a enum
Linux 4.4.295
irqchip: nvic: Fix offset for Interrupt Priority Offsets
irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL
iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove
iio: itg3200: Call iio_trigger_notify_done() on error
iio: ltr501: Don't return error code in trigger handler
iio: mma8452: Fix trigger reference couting
iio: stk3310: Don't return error code in interrupt handler
usb: core: config: fix validation of wMaxPacketValue entries
USB: gadget: zero allocate endpoint 0 buffers
USB: gadget: detect too-big endpoint 0 requests
net/qla3xxx: fix an error code in ql_adapter_up()
net, neigh: clear whole pneigh_entry at alloc time
net: fec: only clear interrupt of handling queue in fec_enet_rx_queue()
net: altera: set a couple error code in probe()
net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
tracefs: Set all files to the same group ownership as the mount option
signalfd: use wake_up_pollfree()
binder: use wake_up_pollfree()
wait: add wake_up_pollfree()
libata: add horkage for ASMedia 1092
can: pch_can: pch_can_rx_normal: fix use after free
tracefs: Have new files inherit the ownership of their parent
ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*()
ALSA: pcm: oss: Limit the period size to 16MB
ALSA: pcm: oss: Fix negative period/buffer sizes
ALSA: ctl: Fix copy of updated id with element read/write
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
can: sja1000: fix use after free in ems_pcmcia_add_card()
HID: check for valid USB device for many HID drivers
HID: wacom: fix problems when device is not a valid USB device
HID: add USB_HID dependancy on some USB HID drivers
HID: add USB_HID dependancy to hid-chicony
HID: add USB_HID dependancy to hid-prodikeys
HID: add hid_is_usb() function to make it simpler for USB detection
HID: introduce hid_is_using_ll_driver
UPSTREAM: USB: gadget: zero allocate endpoint 0 buffers
UPSTREAM: USB: gadget: detect too-big endpoint 0 requests
Linux 4.4.294
serial: pl011: Add ACPI SBSA UART match id
tty: serial: msm_serial: Deactivate RX DMA for polling support
vgacon: Propagate console boot parameters before calling `vc_resize'
parisc: Fix "make install" on newer debian releases
siphash: use _unaligned version by default
net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings()
natsemi: xtensa: fix section mismatch warnings
fget: check that the fd still exists after getting a ref to it
fs: add fget_many() and fput_many()
sata_fsl: fix warning in remove_proc_entry when rmmod sata_fsl
sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
kprobes: Limit max data_size of the kretprobe instances
net: ethernet: dec: tulip: de4x5: fix possible array overflows in type3_infoblock()
net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound
scsi: iscsi: Unblock session then wake up error handler
s390/setup: avoid using memblock_enforce_memory_limit
platform/x86: thinkpad_acpi: Fix WWAN device disabled issue after S3 deep
net: return correct error code
hugetlb: take PMD sharing into account when flushing tlb/caches
tty: hvc: replace BUG_ON() with negative return value
xen/netfront: don't trust the backend response data blindly
xen/netfront: disentangle tx_skb_freelist
xen/netfront: don't read data from request on the ring page
xen/netfront: read response from backend only once
xen/blkfront: don't trust the backend response data blindly
xen/blkfront: don't take local copy of a request from the ring page
xen/blkfront: read response from backend only once
xen: sync include/xen/interface/io/ring.h with Xen's newest version
shm: extend forced shm destroy to support objects from several IPC nses
fuse: release pipe buf after last use
fuse: fix page stealing
NFC: add NCI_UNREG flag to eliminate the race
proc/vmcore: fix clearing user buffer by properly using clear_user()
hugetlbfs: flush TLBs correctly after huge_pmd_unshare
tracing: Check pid filtering when creating events
tcp_cubic: fix spurious Hystart ACK train detections for not-cwnd-limited flows
scsi: mpt3sas: Fix kernel panic during drive powercycle test
ARM: socfpga: Fix crash with CONFIG_FORTIRY_SOURCE
NFSv42: Don't fail clone() unless the OP_CLONE operation failed
net: ieee802154: handle iftypes as u32
ASoC: topology: Add missing rwsem around snd_ctl_remove() calls
ARM: dts: BCM5301X: Add interrupt properties to GPIO node
xen: detect uninitialized xenbus in xenbus_init
xen: don't continue xenstore initialization in case of errors
staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect()
ALSA: ctxfi: Fix out-of-range access
binder: fix test regression due to sender_euid change
usb: hub: Fix locking issues with address0_mutex
usb: hub: Fix usb enumeration issue due to address0 race
USB: serial: option: add Fibocom FM101-GL variants
USB: serial: option: add Telit LE910S1 0x9200 composition
staging: ion: Prevent incorrect reference counting behavour
Change-Id: Iadf9f213915d2a02b27ceb3b2144eac827ade329
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Changes in 4.4.295
HID: introduce hid_is_using_ll_driver
HID: add hid_is_usb() function to make it simpler for USB detection
HID: add USB_HID dependancy to hid-prodikeys
HID: add USB_HID dependancy to hid-chicony
HID: add USB_HID dependancy on some USB HID drivers
HID: wacom: fix problems when device is not a valid USB device
HID: check for valid USB device for many HID drivers
can: sja1000: fix use after free in ems_pcmcia_add_card()
nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
ALSA: ctl: Fix copy of updated id with element read/write
ALSA: pcm: oss: Fix negative period/buffer sizes
ALSA: pcm: oss: Limit the period size to 16MB
ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*()
tracefs: Have new files inherit the ownership of their parent
can: pch_can: pch_can_rx_normal: fix use after free
libata: add horkage for ASMedia 1092
wait: add wake_up_pollfree()
binder: use wake_up_pollfree()
signalfd: use wake_up_pollfree()
tracefs: Set all files to the same group ownership as the mount option
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero
net: altera: set a couple error code in probe()
net: fec: only clear interrupt of handling queue in fec_enet_rx_queue()
net, neigh: clear whole pneigh_entry at alloc time
net/qla3xxx: fix an error code in ql_adapter_up()
USB: gadget: detect too-big endpoint 0 requests
USB: gadget: zero allocate endpoint 0 buffers
usb: core: config: fix validation of wMaxPacketValue entries
iio: stk3310: Don't return error code in interrupt handler
iio: mma8452: Fix trigger reference couting
iio: ltr501: Don't return error code in trigger handler
iio: itg3200: Call iio_trigger_notify_done() on error
iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove
irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL
irqchip: nvic: Fix offset for Interrupt Priority Offsets
Linux 4.4.295
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4810f7e2ebd538739fb0d62f9eade0921a9badfb
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commit 42288cb44c4b5fff7653bc392b583a2b8bd6a8c0 upstream.
Several ->poll() implementations are special in that they use a
waitqueue whose lifetime is the current task, rather than the struct
file as is normally the case. This is okay for blocking polls, since a
blocking poll occurs within one task; however, non-blocking polls
require another solution. This solution is for the queue to be cleared
before it is freed, using 'wake_up_poll(wq, EPOLLHUP | POLLFREE);'.
However, that has a bug: wake_up_poll() calls __wake_up() with
nr_exclusive=1. Therefore, if there are multiple "exclusive" waiters,
and the wakeup function for the first one returns a positive value, only
that one will be called. That's *not* what's needed for POLLFREE;
POLLFREE is special in that it really needs to wake up everyone.
Considering the three non-blocking poll systems:
- io_uring poll doesn't handle POLLFREE at all, so it is broken anyway.
- aio poll is unaffected, since it doesn't support exclusive waits.
However, that's fragile, as someone could add this feature later.
- epoll doesn't appear to be broken by this, since its wakeup function
returns 0 when it sees POLLFREE. But this is fragile.
Although there is a workaround (see epoll), it's better to define a
function which always sends POLLFREE to all waiters. Add such a
function. Also make it verify that the queue really becomes empty after
all waiters have been woken up.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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lineage-18.1-caf-msm8998
* common/android-4.4-p:
Linux 4.4.293
usb: max-3421: Use driver data instead of maintaining a list of bound devices
ASoC: DAPM: Cover regression by kctl change notification fix
batman-adv: Avoid WARN_ON timing related checks
batman-adv: Don't always reallocate the fragmentation skb head
batman-adv: Reserve needed_*room for fragments
batman-adv: Consider fragmentation for needed_headroom
batman-adv: set .owner to THIS_MODULE
batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN
batman-adv: Prevent duplicated softif_vlan entry
batman-adv: Fix multicast TT issues with bogus ROAM flags
batman-adv: Keep fragments equally sized
drm/amdgpu: fix set scaling mode Full/Full aspect/Center not works on vga and dvi connectors
drm/udl: fix control-message timeout
cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
parisc/sticon: fix reverse colors
btrfs: fix memory ordering between normal and ordered work functions
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
hexagon: export raw I/O routines for modules
tun: fix bonding active backup with arp monitoring
NFC: reorder the logic in nfc_{un,}register_device
NFC: reorganize the functions in nci_request
platform/x86: hp_accel: Fix an error handling path in 'lis3lv02d_probe()'
mips: bcm63xx: add support for clk_get_parent()
net: bnx2x: fix variable dereferenced before check
sched/core: Mitigate race cpus_share_cache()/update_top_cache_domain()
mips: BCM63XX: ensure that CPU_SUPPORTS_32BIT_KERNEL is set
sh: define __BIG_ENDIAN for math-emu
sh: fix kconfig unmet dependency warning for FRAME_POINTER
maple: fix wrong return value of maple_bus_init().
sh: check return code of request_irq
powerpc/dcr: Use cmplwi instead of 3-argument cmpli
ALSA: gus: fix null pointer dereference on pointer block
powerpc/5200: dts: fix memory node unit name
scsi: target: Fix alua_tg_pt_gps_count tracking
scsi: target: Fix ordered tag handling
MIPS: sni: Fix the build
tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc
usb: host: ohci-tmio: check return value after calling platform_get_resource()
ARM: dts: omap: fix gpmc,mux-add-data type
scsi: advansys: Fix kernel pointer leak
usb: musb: tusb6010: check return value after calling platform_get_resource()
scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
net: batman-adv: fix error handling
PCI/MSI: Destroy sysfs before freeing entries
parisc/entry: fix trace test in syscall exit path
PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros
mm, oom: pagefault_out_of_memory: don't force global OOM for dying tasks
ARM: 9156/1: drop cc-option fallbacks for architecture selection
USB: chipidea: fix interrupt deadlock
vsock: prevent unnecessary refcnt inc for nonblocking connect
nfc: pn533: Fix double free when pn533_fill_fragment_skbs() fails
llc: fix out-of-bound array index in llc_sk_dev_hash()
bonding: Fix a use-after-free problem when bond_sysfs_slave_add() failed
net: davinci_emac: Fix interrupt pacing disable
xen-pciback: Fix return in pm_ctrl_init()
scsi: qla2xxx: Turn off target reset during issue_lip
watchdog: f71808e_wdt: fix inaccurate report in WDIOC_GETTIMEOUT
m68k: set a default value for MEMORY_RESERVE
netfilter: nfnetlink_queue: fix OOB when mac header was cleared
dmaengine: at_xdmac: fix AT_XDMAC_CC_PERID() macro
RDMA/mlx4: Return missed an error if device doesn't support steering
scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn()
power: supply: rt5033_battery: Change voltage values to µV
usb: gadget: hid: fix error code in do_config()
serial: 8250_dw: Drop wrong use of ACPI_PTR()
video: fbdev: chipsfb: use memset_io() instead of memset()
memory: fsl_ifc: fix leak of irq and nand_irq in fsl_ifc_ctrl_probe
JFS: fix memleak in jfs_mount
scsi: dc395: Fix error case unwinding
ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
crypto: pcrypt - Delay write to padata->info
libertas: Fix possible memory leak in probe and disconnect
libertas_tf: Fix possible memory leak in probe and disconnect
smackfs: use netlbl_cfg_cipsov4_del() for deleting cipso_v4_doi
mwifiex: Send DELBA requests according to spec
platform/x86: thinkpad_acpi: Fix bitwise vs. logical warning
net: stream: don't purge sk_error_queue in sk_stream_kill_queues()
drm/msm: uninitialized variable in msm_gem_import()
memstick: jmb38x_ms: use appropriate free function in jmb38x_ms_alloc_host()
memstick: avoid out-of-range warning
b43: fix a lower bounds test
b43legacy: fix a lower bounds test
crypto: qat - detect PFVF collision after ACK
ath9k: Fix potential interrupt storm on queue reset
cpuidle: Fix kobject memory leaks in error paths
media: si470x: Avoid card name truncation
media: dvb-usb: fix ununit-value in az6027_rc_query
parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling
parisc: fix warning in flush_tlb_all
ARM: 9136/1: ARMv7-M uses BE-8, not BE-32
ARM: clang: Do not rely on lr register for stacktrace
smackfs: use __GFP_NOFAIL for smk_cipso_doi()
iwlwifi: mvm: disable RX-diversity in powersave
PM: hibernate: Get block device exclusively in swsusp_check()
mwl8k: Fix use-after-free in mwl8k_fw_state_machine()
lib/xz: Validate the value before assigning it to an enum variable
lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression
memstick: r592: Fix a UAF bug when removing the driver
ACPI: battery: Accept charges over the design capacity as full
ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()
tracefs: Have tracefs directories not set OTH permission bits by default
media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()
ACPICA: Avoid evaluating methods too early during system resume
ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK
media: mceusb: return without resubmitting URB in case of -EPROTO error.
media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe()
media: uvcvideo: Set capability in s_param
media: netup_unidvb: handle interrupt properly according to the firmware
media: mt9p031: Fix corrupted frame after restarting stream
x86: Increase exception stack sizes
smackfs: Fix use-after-free in netlbl_catmap_walk()
MIPS: lantiq: dma: reset correct number of channel
MIPS: lantiq: dma: add small delay after reset
platform/x86: wmi: do not fail if disabling fails
Bluetooth: fix use-after-free error in lock_sock_nested()
Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg()
USB: iowarrior: fix control-message timeouts
USB: serial: keyspan: fix memleak on probe errors
iio: dac: ad5446: Fix ad5622_write() return value
quota: correct error number in free_dqentry()
quota: check block number when reading the block in quota file
ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume
ALSA: mixer: oss: Fix racy access to slots
power: supply: max17042_battery: use VFSOC for capacity when no rsns
power: supply: max17042_battery: Prevent int underflow in set_soc_threshold
signal: Remove the bogus sigkill_pending in ptrace_stop
mwifiex: Read a PCI register after writing the TX ring write pointer
wcn36xx: Fix HT40 capability for 2Ghz band
PCI: Mark Atheros QCA6174 to avoid bus reset
ath6kl: fix control-message timeout
ath6kl: fix division by zero in send path
mwifiex: fix division by zero in fw download path
EDAC/sb_edac: Fix top-of-high-memory value for Broadwell/Haswell
hwmon: (pmbus/lm25066) Add offset coefficients
btrfs: fix lost error handling when replaying directory deletes
vmxnet3: do not stop tx queues after netif_device_detach()
spi: spl022: fix Microwire full duplex mode
xen/netfront: stop tx queues during live migration
mmc: winbond: don't build on M68K
hyperv/vmbus: include linux/bitops.h
x86/irq: Ensure PI wakeup handler is unregistered before module unload
ALSA: timer: Unconditionally unlink slave instances, too
ALSA: timer: Fix use-after-free problem
ALSA: synth: missing check for possible NULL after the call to kstrdup
ALSA: line6: fix control and interrupt message timeouts
ALSA: 6fire: fix control and bulk message timeouts
ALSA: ua101: fix division by zero at probe
media: ite-cir: IR receiver stop working after receive overflow
parisc: Fix ptrace check on syscall return
mmc: dw_mmc: Dont wait for DRTO on Write RSP error
ocfs2: fix data corruption on truncate
libata: fix read log timeout value
Input: i8042 - Add quirk for Fujitsu Lifebook T725
Input: elantench - fix misreporting trackpoint coordinates
xhci: Fix USB 3.1 enumeration issues by increasing roothub power-on-good delay
binder: use cred instead of task for selinux checks
binder: use euid from cred instead of using task
FROMGIT: binder: fix test regression due to sender_euid change
BACKPORT: binder: use cred instead of task for selinux checks
BACKPORT: binder: use euid from cred instead of using task
BACKPORT: ip_gre: add validation for csum_start
Linux 4.4.292
rsi: fix control-message timeout
staging: rtl8192u: fix control-message timeouts
staging: r8712u: fix control-message timeout
comedi: vmk80xx: fix bulk and interrupt message timeouts
comedi: vmk80xx: fix bulk-buffer overflow
comedi: vmk80xx: fix transfer-buffer overflows
staging: comedi: drivers: replace le16_to_cpu() with usb_endpoint_maxp()
comedi: ni_usb6501: fix NULL-deref in command paths
comedi: dt9812: fix DMA buffers on stack
isofs: Fix out of bound access for corrupted isofs image
usb: hso: fix error handling code of hso_create_net_device
printk/console: Allow to disable console output by using console="" or console=null
usb-storage: Add compatibility quirk flags for iODD 2531/2541
usb: gadget: Mark USB_FSL_QE broken on 64-bit
IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields
IB/qib: Use struct_size() helper
net: hso: register netdev later to avoid a race condition
ARM: 9120/1: Revert "amba: make use of -1 IRQs warn"
scsi: core: Put LLD module refcnt after SCSI device is released
Linux 4.4.291
sctp: add vtag check in sctp_sf_violation
sctp: use init_tag from inithdr for ABORT chunk
nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST
regmap: Fix possible double-free in regcache_rbtree_exit()
net: lan78xx: fix division by zero in send path
mmc: sdhci: Map more voltage level to SDHCI_POWER_330
mmc: dw_mmc: exynos: fix the finding clock sample value
mmc: vub300: fix control-message timeouts
Revert "net: mdiobus: Fix memory leak in __mdiobus_register"
nfc: port100: fix using -ERRNO as command type mask
ata: sata_mv: Fix the error handling of mv_chip_id()
usbnet: fix error return code in usbnet_probe()
usbnet: sanity check for maxpacket
ARM: 8819/1: Remove '-p' from LDFLAGS
ARM: 9139/1: kprobes: fix arch_init_kprobes() prototype
ARM: 9134/1: remove duplicate memcpy() definition
ARM: 9133/1: mm: proc-macros: ensure *_tlb_fns are 4B aligned
Linux 4.4.290
ARM: 9122/1: select HAVE_FUTEX_CMPXCHG
tracing: Have all levels of checks prevent recursion
net: mdiobus: Fix memory leak in __mdiobus_register
ALSA: hda: avoid write to STATESTS if controller is in reset
platform/x86: intel_scu_ipc: Update timeout value in comment
isdn: mISDN: Fix sleeping function called from invalid context
ARM: dts: spear3xx: Fix gmac node
netfilter: Kconfig: use 'default y' instead of 'm' for bool config option
isdn: cpai: check ctr->cnr to avoid array index out of bound
nfc: nci: fix the UAF of rf_conn_info object
ovl: fix missing negative dentry check in ovl_rename()
ASoC: DAPM: Fix missing kctl change notifications
ALSA: usb-audio: Provide quirk for Sennheiser GSP670 Headset
elfcore: correct reference to CONFIG_UML
ocfs2: mount fails with buffer overflow in strlen
can: peak_pci: peak_pci_remove(): fix UAF
can: peak_usb: pcan_usb_fd_decode_status(): fix back to ERROR_ACTIVE state notification
can: rcar_can: fix suspend/resume
NIOS2: irqflags: rename a redefined register name
netfilter: ipvs: make global sysctl readonly in non-init netns
NFSD: Keep existing listeners on portlist error
r8152: select CRC32 and CRYPTO/CRYPTO_HASH/CRYPTO_SHA256
drm/msm: Fix null pointer dereference on pointer edp
pata_legacy: fix a couple uninitialized variable bugs
NFC: digital: fix possible memory leak in digital_in_send_sdd_req()
NFC: digital: fix possible memory leak in digital_tg_listen_mdaa()
nfc: fix error handling of nfc_proto_register()
ethernet: s2io: fix setting mac address during resume
net: encx24j600: check error in devm_regmap_init_encx24j600
net: korina: select CRC32
net: arc: select CRC32
iio: ssp_sensors: fix error code in ssp_print_mcu_debug()
iio: ssp_sensors: add more range checking in ssp_parse_dataframe()
iio: adc128s052: Fix the error handling path of 'adc128_probe()'
nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells
USB: serial: option: add Telit LE910Cx composition 0x1204
USB: serial: qcserial: add EM9191 QDL support
Input: xpad - add support for another USB ID of Nacon GC-100
efi/cper: use stack buffer for error record decoding
cb710: avoid NULL pointer subtraction
xhci: Enable trust tx length quirk for Fresco FL11 USB controller
s390: fix strrchr() implementation
ALSA: seq: Fix a potential UAF by wrong private_free call order
Conflicts:
drivers/gpu/drm/msm/msm_gem.c
net/bluetooth/l2cap_sock.c
Change-Id: Ia008e8ba419fa5604b5780265564ba80d05fbafa
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Changes in 4.4.293
binder: use euid from cred instead of using task
binder: use cred instead of task for selinux checks
xhci: Fix USB 3.1 enumeration issues by increasing roothub power-on-good delay
Input: elantench - fix misreporting trackpoint coordinates
Input: i8042 - Add quirk for Fujitsu Lifebook T725
libata: fix read log timeout value
ocfs2: fix data corruption on truncate
mmc: dw_mmc: Dont wait for DRTO on Write RSP error
parisc: Fix ptrace check on syscall return
media: ite-cir: IR receiver stop working after receive overflow
ALSA: ua101: fix division by zero at probe
ALSA: 6fire: fix control and bulk message timeouts
ALSA: line6: fix control and interrupt message timeouts
ALSA: synth: missing check for possible NULL after the call to kstrdup
ALSA: timer: Fix use-after-free problem
ALSA: timer: Unconditionally unlink slave instances, too
x86/irq: Ensure PI wakeup handler is unregistered before module unload
hyperv/vmbus: include linux/bitops.h
mmc: winbond: don't build on M68K
xen/netfront: stop tx queues during live migration
spi: spl022: fix Microwire full duplex mode
vmxnet3: do not stop tx queues after netif_device_detach()
btrfs: fix lost error handling when replaying directory deletes
hwmon: (pmbus/lm25066) Add offset coefficients
EDAC/sb_edac: Fix top-of-high-memory value for Broadwell/Haswell
mwifiex: fix division by zero in fw download path
ath6kl: fix division by zero in send path
ath6kl: fix control-message timeout
PCI: Mark Atheros QCA6174 to avoid bus reset
wcn36xx: Fix HT40 capability for 2Ghz band
mwifiex: Read a PCI register after writing the TX ring write pointer
signal: Remove the bogus sigkill_pending in ptrace_stop
power: supply: max17042_battery: Prevent int underflow in set_soc_threshold
power: supply: max17042_battery: use VFSOC for capacity when no rsns
ALSA: mixer: oss: Fix racy access to slots
ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume
quota: check block number when reading the block in quota file
quota: correct error number in free_dqentry()
iio: dac: ad5446: Fix ad5622_write() return value
USB: serial: keyspan: fix memleak on probe errors
USB: iowarrior: fix control-message timeouts
Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg()
Bluetooth: fix use-after-free error in lock_sock_nested()
platform/x86: wmi: do not fail if disabling fails
MIPS: lantiq: dma: add small delay after reset
MIPS: lantiq: dma: reset correct number of channel
smackfs: Fix use-after-free in netlbl_catmap_walk()
x86: Increase exception stack sizes
media: mt9p031: Fix corrupted frame after restarting stream
media: netup_unidvb: handle interrupt properly according to the firmware
media: uvcvideo: Set capability in s_param
media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe()
media: mceusb: return without resubmitting URB in case of -EPROTO error.
ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK
ACPICA: Avoid evaluating methods too early during system resume
media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()
tracefs: Have tracefs directories not set OTH permission bits by default
ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()
ACPI: battery: Accept charges over the design capacity as full
memstick: r592: Fix a UAF bug when removing the driver
lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression
lib/xz: Validate the value before assigning it to an enum variable
mwl8k: Fix use-after-free in mwl8k_fw_state_machine()
PM: hibernate: Get block device exclusively in swsusp_check()
iwlwifi: mvm: disable RX-diversity in powersave
smackfs: use __GFP_NOFAIL for smk_cipso_doi()
ARM: clang: Do not rely on lr register for stacktrace
ARM: 9136/1: ARMv7-M uses BE-8, not BE-32
parisc: fix warning in flush_tlb_all
parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling
media: dvb-usb: fix ununit-value in az6027_rc_query
media: si470x: Avoid card name truncation
cpuidle: Fix kobject memory leaks in error paths
ath9k: Fix potential interrupt storm on queue reset
crypto: qat - detect PFVF collision after ACK
b43legacy: fix a lower bounds test
b43: fix a lower bounds test
memstick: avoid out-of-range warning
memstick: jmb38x_ms: use appropriate free function in jmb38x_ms_alloc_host()
drm/msm: uninitialized variable in msm_gem_import()
net: stream: don't purge sk_error_queue in sk_stream_kill_queues()
platform/x86: thinkpad_acpi: Fix bitwise vs. logical warning
mwifiex: Send DELBA requests according to spec
smackfs: use netlbl_cfg_cipsov4_del() for deleting cipso_v4_doi
libertas_tf: Fix possible memory leak in probe and disconnect
libertas: Fix possible memory leak in probe and disconnect
crypto: pcrypt - Delay write to padata->info
ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
scsi: dc395: Fix error case unwinding
JFS: fix memleak in jfs_mount
memory: fsl_ifc: fix leak of irq and nand_irq in fsl_ifc_ctrl_probe
video: fbdev: chipsfb: use memset_io() instead of memset()
serial: 8250_dw: Drop wrong use of ACPI_PTR()
usb: gadget: hid: fix error code in do_config()
power: supply: rt5033_battery: Change voltage values to µV
scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn()
RDMA/mlx4: Return missed an error if device doesn't support steering
dmaengine: at_xdmac: fix AT_XDMAC_CC_PERID() macro
netfilter: nfnetlink_queue: fix OOB when mac header was cleared
m68k: set a default value for MEMORY_RESERVE
watchdog: f71808e_wdt: fix inaccurate report in WDIOC_GETTIMEOUT
scsi: qla2xxx: Turn off target reset during issue_lip
xen-pciback: Fix return in pm_ctrl_init()
net: davinci_emac: Fix interrupt pacing disable
bonding: Fix a use-after-free problem when bond_sysfs_slave_add() failed
llc: fix out-of-bound array index in llc_sk_dev_hash()
nfc: pn533: Fix double free when pn533_fill_fragment_skbs() fails
vsock: prevent unnecessary refcnt inc for nonblocking connect
USB: chipidea: fix interrupt deadlock
ARM: 9156/1: drop cc-option fallbacks for architecture selection
mm, oom: pagefault_out_of_memory: don't force global OOM for dying tasks
PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros
parisc/entry: fix trace test in syscall exit path
PCI/MSI: Destroy sysfs before freeing entries
net: batman-adv: fix error handling
scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
usb: musb: tusb6010: check return value after calling platform_get_resource()
scsi: advansys: Fix kernel pointer leak
ARM: dts: omap: fix gpmc,mux-add-data type
usb: host: ohci-tmio: check return value after calling platform_get_resource()
tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc
MIPS: sni: Fix the build
scsi: target: Fix ordered tag handling
scsi: target: Fix alua_tg_pt_gps_count tracking
powerpc/5200: dts: fix memory node unit name
ALSA: gus: fix null pointer dereference on pointer block
powerpc/dcr: Use cmplwi instead of 3-argument cmpli
sh: check return code of request_irq
maple: fix wrong return value of maple_bus_init().
sh: fix kconfig unmet dependency warning for FRAME_POINTER
sh: define __BIG_ENDIAN for math-emu
mips: BCM63XX: ensure that CPU_SUPPORTS_32BIT_KERNEL is set
sched/core: Mitigate race cpus_share_cache()/update_top_cache_domain()
net: bnx2x: fix variable dereferenced before check
mips: bcm63xx: add support for clk_get_parent()
platform/x86: hp_accel: Fix an error handling path in 'lis3lv02d_probe()'
NFC: reorganize the functions in nci_request
NFC: reorder the logic in nfc_{un,}register_device
tun: fix bonding active backup with arp monitoring
hexagon: export raw I/O routines for modules
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
btrfs: fix memory ordering between normal and ordered work functions
parisc/sticon: fix reverse colors
cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
drm/udl: fix control-message timeout
drm/amdgpu: fix set scaling mode Full/Full aspect/Center not works on vga and dvi connectors
batman-adv: Keep fragments equally sized
batman-adv: Fix multicast TT issues with bogus ROAM flags
batman-adv: Prevent duplicated softif_vlan entry
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN
batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
batman-adv: set .owner to THIS_MODULE
batman-adv: Consider fragmentation for needed_headroom
batman-adv: Reserve needed_*room for fragments
batman-adv: Don't always reallocate the fragmentation skb head
batman-adv: Avoid WARN_ON timing related checks
ASoC: DAPM: Cover regression by kctl change notification fix
usb: max-3421: Use driver data instead of maintaining a list of bound devices
Linux 4.4.293
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I233cfa7b0fe613afd388fcc316caf184005eaee9
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[ Upstream commit 42dc938a590c96eeb429e1830123fef2366d9c80 ]
Nothing protects the access to the per_cpu variable sd_llc_id. When testing
the same CPU (i.e. this_cpu == that_cpu), a race condition exists with
update_top_cache_domain(). One scenario being:
CPU1 CPU2
==================================================================
per_cpu(sd_llc_id, CPUX) => 0
partition_sched_domains_locked()
detach_destroy_domains()
cpus_share_cache(CPUX, CPUX) update_top_cache_domain(CPUX)
per_cpu(sd_llc_id, CPUX) => 0
per_cpu(sd_llc_id, CPUX) = CPUX
per_cpu(sd_llc_id, CPUX) => CPUX
return false
ttwu_queue_cond() wouldn't catch smp_processor_id() == cpu and the result
is a warning triggered from ttwu_queue_wakelist().
Avoid a such race in cpus_share_cache() by always returning true when
this_cpu == that_cpu.
Fixes: 518cd6234178 ("sched: Only queue remote wakeups when crossing cache boundaries")
Reported-by: Jing-Ting Wu <jing-ting.wu@mediatek.com>
Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20211104175120.857087-1-vincent.donnefort@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
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https://android.googlesource.com/kernel/common into lineage-18.1-caf-msm8998
# By Pavel Skripkin (6) and others
# Via Greg Kroah-Hartman
* android-4.4-p:
Linux 4.4.278
sis900: Fix missing pci_disable_device() in probe and remove
tulip: windbond-840: Fix missing pci_disable_device() in probe and remove
net: llc: fix skb_over_panic
mlx4: Fix missing error code in mlx4_load_one()
tipc: fix sleeping in tipc accept routine
netfilter: nft_nat: allow to specify layer 4 protocol NAT only
cfg80211: Fix possible memory leak in function cfg80211_bss_update
x86/asm: Ensure asm/proto.h can be included stand-alone
NIU: fix incorrect error return, missed in previous revert
can: esd_usb2: fix memory leak
can: ems_usb: fix memory leak
can: usb_8dev: fix memory leak
ocfs2: issue zeroout to EOF blocks
ocfs2: fix zero out valid data
ARM: ensure the signal page contains defined contents
lib/string.c: add multibyte memset functions
ARM: dts: versatile: Fix up interrupt controller node names
hfs: add lock nesting notation to hfs_find_init
hfs: fix high memory mapping in hfs_bnode_read
hfs: add missing clean-up in hfs_fill_super
sctp: move 198 addresses from unusable to private scope
net/802/garp: fix memleak in garp_request_join()
net/802/mrp: fix memleak in mrp_request_join()
workqueue: fix UAF in pwq_unbound_release_workfn()
af_unix: fix garbage collect vs MSG_PEEK
net: split out functions related to registering inflight socket files
Linux 4.4.277
btrfs: compression: don't try to compress if we don't have enough pages
iio: accel: bma180: Fix BMA25x bandwidth register values
iio: accel: bma180: Use explicit member assignment
net: bcmgenet: ensure EXT_ENERGY_DET_MASK is clear
media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
tracing: Fix bug in rb_per_cpu_empty() that might cause deadloop.
USB: serial: cp210x: add ID for CEL EM3588 USB ZigBee stick
USB: serial: cp210x: fix comments for GE CS1000
USB: serial: option: add support for u-blox LARA-R6 family
usb: renesas_usbhs: Fix superfluous irqs happen after usb_pkt_pop()
usb: max-3421: Prevent corruption of freed memory
USB: usb-storage: Add LaCie Rugged USB3-FW to IGNORE_UAS
usb: hub: Disable USB 3 device initiated lpm if exit latency is too high
KVM: PPC: Book3S: Fix H_RTAS rets buffer overflow
xhci: Fix lost USB 2 remote wake
ALSA: sb: Fix potential ABBA deadlock in CSP driver
s390/ftrace: fix ftrace_update_ftrace_func implementation
proc: Avoid mixing integer types in mem_rw()
Revert "USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem"
scsi: target: Fix protect handling in WRITE SAME(32)
scsi: iscsi: Fix iface sysfs attr detection
netrom: Decrease sock refcount when sock timers expire
net: decnet: Fix sleeping inside in af_decnet
net: fix uninit-value in caif_seqpkt_sendmsg
s390/bpf: Perform r1 range checking before accessing jit->seen_reg[r1]
perf probe-file: Delete namelist in del_events() on the error path
perf test bpf: Free obj_buf
igb: Check if num of q_vectors is smaller than max before array access
iavf: Fix an error handling path in 'iavf_probe()'
ipv6: tcp: drop silly ICMPv6 packet too big messages
tcp: annotate data races around tp->mtu_info
net: validate lwtstate->data before returning from skb_tunnel_info()
net: ti: fix UAF in tlan_remove_one
net: moxa: fix UAF in moxart_mac_probe
net: bcmgenet: Ensure all TX/RX queues DMAs are disabled
net: ipv6: fix return value of ip6_skb_dst_mtu
x86/fpu: Make init_fpstate correct with optimized XSAVE
Revert "memory: fsl_ifc: fix leak of IO mapping on probe failure"
sched/fair: Fix CFS bandwidth hrtimer expiry type
scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
thermal/core: Correct function name thermal_zone_device_unregister()
ARM: imx: pm-imx5: Fix references to imx5_cpu_suspend_info
ARM: dts: imx6: phyFLEX: Fix UART hardware flow control
ARM: dts: BCM63xx: Fix NAND nodes names
ARM: brcmstb: dts: fix NAND nodes names
Change-Id: Id59b93b8704270f45923f262facbadde4c486a15
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Changes in 4.4.277
ARM: brcmstb: dts: fix NAND nodes names
ARM: dts: BCM63xx: Fix NAND nodes names
ARM: dts: imx6: phyFLEX: Fix UART hardware flow control
ARM: imx: pm-imx5: Fix references to imx5_cpu_suspend_info
thermal/core: Correct function name thermal_zone_device_unregister()
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8
sched/fair: Fix CFS bandwidth hrtimer expiry type
Revert "memory: fsl_ifc: fix leak of IO mapping on probe failure"
x86/fpu: Make init_fpstate correct with optimized XSAVE
net: ipv6: fix return value of ip6_skb_dst_mtu
net: bcmgenet: Ensure all TX/RX queues DMAs are disabled
net: moxa: fix UAF in moxart_mac_probe
net: ti: fix UAF in tlan_remove_one
net: validate lwtstate->data before returning from skb_tunnel_info()
tcp: annotate data races around tp->mtu_info
ipv6: tcp: drop silly ICMPv6 packet too big messages
iavf: Fix an error handling path in 'iavf_probe()'
igb: Check if num of q_vectors is smaller than max before array access
perf test bpf: Free obj_buf
perf probe-file: Delete namelist in del_events() on the error path
s390/bpf: Perform r1 range checking before accessing jit->seen_reg[r1]
net: fix uninit-value in caif_seqpkt_sendmsg
net: decnet: Fix sleeping inside in af_decnet
netrom: Decrease sock refcount when sock timers expire
scsi: iscsi: Fix iface sysfs attr detection
scsi: target: Fix protect handling in WRITE SAME(32)
Revert "USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem"
proc: Avoid mixing integer types in mem_rw()
s390/ftrace: fix ftrace_update_ftrace_func implementation
ALSA: sb: Fix potential ABBA deadlock in CSP driver
xhci: Fix lost USB 2 remote wake
KVM: PPC: Book3S: Fix H_RTAS rets buffer overflow
usb: hub: Disable USB 3 device initiated lpm if exit latency is too high
USB: usb-storage: Add LaCie Rugged USB3-FW to IGNORE_UAS
usb: max-3421: Prevent corruption of freed memory
usb: renesas_usbhs: Fix superfluous irqs happen after usb_pkt_pop()
USB: serial: option: add support for u-blox LARA-R6 family
USB: serial: cp210x: fix comments for GE CS1000
USB: serial: cp210x: add ID for CEL EM3588 USB ZigBee stick
tracing: Fix bug in rb_per_cpu_empty() that might cause deadloop.
media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()
net: bcmgenet: ensure EXT_ENERGY_DET_MASK is clear
iio: accel: bma180: Use explicit member assignment
iio: accel: bma180: Fix BMA25x bandwidth register values
btrfs: compression: don't try to compress if we don't have enough pages
Linux 4.4.277
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7159a9fb5545e504222fcee566c6661c1070c8f7
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[ Upstream commit 72d0ad7cb5bad265adb2014dbe46c4ccb11afaba ]
The time remaining until expiry of the refresh_timer can be negative.
Casting the type to an unsigned 64-bit value will cause integer
underflow, making the runtime_refresh_within return false instead of
true. These situations are rare, but they do happen.
This does not cause user-facing issues or errors; other than
possibly unthrottling cfs_rq's using runtime from the previous period(s),
making the CFS bandwidth enforcement less strict in those (special)
situations.
Signed-off-by: Odin Ugedal <odin@uged.al>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Link: https://lore.kernel.org/r/20210629121452.18429-1-odin@uged.al
Signed-off-by: Sasha Levin <sashal@kernel.org>
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https://android.googlesource.com/kernel/common into lineage-17.1-caf-msm8998
This brings LA.UM.8.2.r1-07400-sdm660.0 up to date with
https://android.googlesource.com/kernel/common/ android-4.4-p at commit:
34b1d1174c2c7 UPSTREAM: arm64: kaslr: Fix up the kernel image alignment
Conflicts:
scripts/setlocalversion
Change-Id: Id2981587a6e92eb10cfdc9b6d13cd4bd2abb5670
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A regression of the FTQ noise has been reported by Ying Huang,
on the following hardware:
8 threads Intel(R) Core(TM)i7-4770 CPU @ 3.40GHz with 8G memory
... which was caused by this commit:
commit 4e5160766fcc ("sched/fair: Propagate asynchrous detach")
The only part of the patch that can increase the noise is the update
of blocked load of group entity in update_blocked_averages().
We can optimize this call and skip the update of group entity if its load
and utilization are already null and there is no pending propagation of load
in the task group.
This optimization partly restores the noise score. A more agressive
optimization has been tried but has shown worse score.
Reported-by: ying.huang@linux.intel.com
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dietmar.eggemann@arm.com
Cc: ying.huang@intel.com
Fixes: 4e5160766fcc ("sched/fair: Propagate asynchrous detach")
Link: http://lkml.kernel.org/r/1489758442-2877-1-git-send-email-vincent.guittot@linaro.org
[ Fixed typos, improved layout. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit bc4278987e3874da62edf585fe8b3bdd9b53f638)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8b4018257c9c9f9cc5a0ed701b8e296a45781271
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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https://source.codeaurora.org/quic/la/kernel/msm-4.4 into lineage-17.1-caf-msm8998
* tag 'LA.UM.8.4.r1-06000-8x98.0' of https://source.codeaurora.org/quic/la/kernel/msm-4.4:
asoc: add missing null check for pcm pointer of snd_pcm_volume
Revert "include: Fix for compilation issue"
media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors
soc: add proxy ports for call screening in machine driver
ARM: dts: msm: add CPU dai for additional proxy ports
Input: add safety guards to input_set_keycode()
sched: Fix out of bounds issue in for_each_cluster macro
msm: kgsl: skip if requested address doesn't fall in the svm range
msm: kgsl: Remove VM_MAYWRITE flag to restrict mprotect
msm: kgsl: Correctly clean up dma buffer attachment in case of error
msm: kgsl: Mark the scratch buffer as privileged
msm: kgsl: Fix possible use-after-free while adding context to active list
asoc: add new path for in call recording
Change-Id: Ic6596e831ef92bab7134db0f49dccaab132dcd56
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[ 31.504753] =================================================================
[ 31.512215] BUG: KASAN: global-out-of-bounds in core_ctl_set_boost+0x554/0x558
[ 31.519637] Read of size 4 at addr ffffffd0327c18f4 by task init/456
[ 31.526160]
[ 31.527707] CPU: 1 PID: 456 Comm: init Tainted: G S W 5.4.12-qgki-debug-gdc9adf3559a6-dirty #25
[ 31.537793] Hardware name: Qualcomm Technologies, Inc. 8350 venus (DT)
[ 31.544499] Call trace:
[ 31.547026] dump_backtrace+0x0/0x2e0
[ 31.550797] show_stack+0x14/0x20
[ 31.554220] dump_stack+0xf0/0x144
[ 31.557732] print_address_description.isra.7+0x3c/0x3d8
[ 31.563190] __kasan_report+0x158/0x23c
[ 31.567144] kasan_report+0xc/0x18
[ 31.570649] __asan_report_load4_noabort+0x18/0x20
[ 31.575572] core_ctl_set_boost+0x554/0x558
[ 31.579881] z3d22747cee+0x14/0x58
[ 31.583385] z991cee001b+0x884/0xd70
[ 31.587071] sched_boost_handler+0xe4/0x108
[ 31.591381] proc_sys_call_handler+0x384/0x420
[ 31.595954] proc_sys_write+0x10/0x18
[ 31.599728] __vfs_write+0x54/0xe8
[ 31.603232] vfs_write+0x15c/0x430
[ 31.606736] ksys_write+0xe8/0x1c0
[ 31.610241] __arm64_sys_write+0x68/0x98
[ 31.614282] el0_svc_common.constprop.0+0x1c0/0x370
[ 31.619302] el0_svc_handler+0xd4/0x178
[ 31.623257] el0_svc+0x8/0xc
Change-Id: I71e71d61e080c1ce948bd0400f9ebb0705a2210b
Signed-off-by: Kassey Li <yingangl@codeaurora.org>
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
[rshaha: Resolved trivial merge conflicts]
Signed-off-by: Rahul Shahare <rshaha@codeaurora.org>
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https://android.googlesource.com/kernel/common into lineage-17.1-caf-msm8998
This brings LA.UM.8.4.r1-05700-8x98.0 up to date with
https://android.googlesource.com/kernel/common/ android-4.4-p at commit:
8476df741c780 BACKPORT: xtables: extend matches and targets with .usersize
Conflicts:
drivers/usb/gadget/function/f_uac1.c
net/netlink/genetlink.c
sound/core/compress_offload.c
Change-Id: Id7b2fdf3942f1986edec869dcd965df632cc1c5f
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Changes in 4.4.231
KVM: s390: reduce number of IO pins to 1
spi: spidev: fix a race between spidev_release and spidev_remove
spi: spidev: fix a potential use-after-free in spidev_release()
scsi: mptscsih: Fix read sense data size
net: cxgb4: fix return error value in t4_prep_fw
smsc95xx: check return value of smsc95xx_reset
smsc95xx: avoid memory leak in smsc95xx_bind
ALSA: compress: fix partial_drain completion state
arm64: kgdb: Fix single-step exception handling oops
ALSA: opl3: fix infoleak in opl3
ALSA: hda - let hs_mic be picked ahead of hp_mic
ALSA: usb-audio: add quirk for MacroSilicon MS2109
KVM: x86: bit 8 of non-leaf PDPEs is not reserved
Revert "ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb"
btrfs: fix fatal extent_buffer readahead vs releasepage race
drm/radeon: fix double free
ARC: entry: fix potential EFA clobber when TIF_SYSCALL_TRACE
ARC: elf: use right ELF_ARCH
bnxt_en: fix NULL dereference in case SR-IOV configuration fails
ipv4: fill fl4_icmp_{type,code} in ping_v4_sendmsg
l2tp: remove skb_dst_set() from l2tp_xmit_skb()
llc: make sure applications use ARPHRD_ETHER
net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb
genetlink: remove genl_bind
tcp: make sure listeners don't initialize congestion-control state
tcp: md5: add missing memory barriers in tcp_md5_do_add()/tcp_md5_hash_key()
tcp: md5: refine tcp_md5_do_add()/tcp_md5_hash_key() barriers
tcp: md5: allow changing MD5 keys in all socket states
i2c: eg20t: Load module automatically if ID matches
Revert "usb/ehci-platform: Set PM runtime as active on resume"
Revert "usb/xhci-plat: Set PM runtime as active on resume"
Revert "usb/ohci-platform: Fix a warning when hibernating"
usb: gadget: udc: atmel: fix uninitialized read in debug printk
staging: comedi: verify array index is correct before using it
perf stat: Zero all the 'ena' and 'run' array slot stats for interval mode
mtd: rawnand: brcmnand: fix CS0 layout
HID: magicmouse: do not set up autorepeat
usb: core: Add a helper function to check the validity of EP type in URB
ALSA: line6: Perform sanity check for each URB creation
ALSA: usb-audio: Fix race against the error recovery URB submission
USB: c67x00: fix use after free in c67x00_giveback_urb
usb: chipidea: core: add wakeup support for extcon
usb: gadget: function: fix missing spinlock in f_uac1_legacy
USB: serial: iuu_phoenix: fix memory corruption
USB: serial: cypress_m8: enable Simply Automated UPB PIM
USB: serial: ch341: add new Product ID for CH340
USB: serial: option: add GosunCn GM500 series
USB: serial: option: add Quectel EG95 LTE modem
virtio: virtio_console: add missing MODULE_DEVICE_TABLE() for rproc serial
fuse: Fix parameter for FS_IOC_{GET,SET}FLAGS
mei: bus: don't clean driver pointer
Input: i8042 - add Lenovo XiaoXin Air 12 to i8042 nomux list
uio_pdrv_genirq: fix use without device tree and no interrupt
MIPS: Fix build for LTS kernel caused by backporting lpj adjustment
hwmon: (emc2103) fix unable to change fan pwm1_enable attribute
dmaengine: fsl-edma: Fix NULL pointer exception in fsl_edma_tx_handler
misc: atmel-ssc: lock with mutex instead of spinlock
sched/fair: handle case of task_h_load() returning 0
Linux 4.4.231
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibbd0a09b0d8d49101c674cf304c3df711e940b77
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commit 01cfcde9c26d8555f0e6e9aea9d6049f87683998 upstream.
task_h_load() can return 0 in some situations like running stress-ng
mmapfork, which forks thousands of threads, in a sched group on a 224 cores
system. The load balance doesn't handle this correctly because
env->imbalance never decreases and it will stop pulling tasks only after
reaching loop_max, which can be equal to the number of running tasks of
the cfs. Make sure that imbalance will be decreased by at least 1.
misfit task is the other feature that doesn't handle correctly such
situation although it's probably more difficult to face the problem
because of the smaller number of CPUs and running tasks on heterogenous
system.
We can't simply ensure that task_h_load() returns at least one because it
would imply to handle underflow in other places.
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: <stable@vger.kernel.org> # v4.4+
Link: https://lkml.kernel.org/r/20200710152426.16981-1-vincent.guittot@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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