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commit 9bbb25afeb182502ca4f2c4f3f88af0681b34cae upstream.
Thomas spotted that fixup_pi_state_owner() can return errors and we
fail to unlock the rt_mutex in that case.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Cc: juri.lelli@arm.com
Cc: bigeasy@linutronix.de
Cc: xlpang@redhat.com
Cc: rostedt@goodmis.org
Cc: mathieu.desnoyers@efficios.com
Cc: jdesfossez@efficios.com
Cc: dvhart@infradead.org
Cc: bristot@redhat.com
Link: http://lkml.kernel.org/r/20170304093558.867401760@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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am: 44854c191e
Change-Id: I361f387f34ccb2a497290c3f1f33803cc899b7da
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commit c236c8e95a3d395b0494e7108f0d41cf36ec107c upstream.
While working on the futex code, I stumbled over this potential
use-after-free scenario. Dmitry triggered it later with syzkaller.
pi_mutex is a pointer into pi_state, which we drop the reference on in
unqueue_me_pi(). So any access to that pointer after that is bad.
Since other sites already do rt_mutex_unlock() with hb->lock held, see
for example futex_lock_pi(), simply move the unlock before
unqueue_me_pi().
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Cc: juri.lelli@arm.com
Cc: bigeasy@linutronix.de
Cc: xlpang@redhat.com
Cc: rostedt@goodmis.org
Cc: mathieu.desnoyers@efficios.com
Cc: jdesfossez@efficios.com
Cc: dvhart@infradead.org
Cc: bristot@redhat.com
Link: http://lkml.kernel.org/r/20170304093558.801744246@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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EAS uses "const struct sched_group_energy * const" fairly consistently.
But a couple of places swap the "*" and second "const", making the
pointer mutable.
In the case of struct sched_group, "* const" would have been an error,
since init_sched_energy() writes to sd->groups->sge.
Change-Id: Ic6a8fcf99e65c0f25d9cc55c32625ef3ca5c9aca
Signed-off-by: Greg Hackmann <ghackmann@google.com>
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am: c0ef1f537a
Change-Id: I3650becd64c5156d24dee601990d48c68057e81d
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This is the 4.4.48 stable release
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This is the 4.4.46 stable release
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This is the 4.4.45 stable release
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The current sched_load_avg_cpu event traces the load for any cfs_rq that is
updated. This is not representative of the CPU load - instead we should only
trace this event when the cfs_rq being updated is in the root_task_group.
Change-Id: I345c2f13f6b5718cb4a89beb247f7887ce97ed6b
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
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update_cfs_rq_load_avg is called from update_blocked_averages without triggering
the sched_load_avg_cpu event. Move the event trigger to inside
update_cfs_rq_load_avg to avoid this missing event.
Change-Id: I6c4f66f687a644e4e7f798db122d28a8f5919b7b
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
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This is the 4.4.43 stable release
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This is the 4.4.40 stable release
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This is the 4.4.39 stable release
Change-Id: I36dd900bb57846dbbcd7b274774f1debef0f1f18
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{min,max}_capacity are static variables that are only updated from
__update_min_max_capacity(), but not used anywhere else.
Remove them together with the function updating them. This has also
the nice side effect of fixing a LOCKDEP warning related to locking
all CPUs in update_min_max_capacity(), as reported by Ke Wang:
[ 2.853595] c0 =============================================
[ 2.859219] c0 [ INFO: possible recursive locking detected ]
[ 2.864852] c0 4.4.6+ #5 Tainted: G W
[ 2.869604] c0 ---------------------------------------------
[ 2.875230] c0 swapper/0/1 is trying to acquire lock:
[ 2.880248] (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c
[ 2.888815] c0
[ 2.888815] c0 but task is already holding lock:
[ 2.895132] (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c
[ 2.903700] c0
[ 2.903700] c0 other info that might help us debug this:
[ 2.910710] c0 Possible unsafe locking scenario:
[ 2.910710] c0
[ 2.917112] c0 CPU0
[ 2.919795] c0 ----
[ 2.922478] lock(&rq->lock);
[ 2.925507] lock(&rq->lock);
[ 2.928536] c0
[ 2.928536] c0 *** DEADLOCK ***
[ 2.928536] c0
[ 2.935200] c0 May be due to missing lock nesting notation
[ 2.935200] c0
[ 2.942471] c0 7 locks held by swapper/0/1:
[ 2.946623] #0: (&dev->mutex){......}, at: [<ffffff800850e118>] __driver_attach+0x64/0xb8
[ 2.954931] #1: (&dev->mutex){......}, at: [<ffffff800850e128>] __driver_attach+0x74/0xb8
[ 2.963239] #2: (cpu_hotplug.lock){++++++}, at: [<ffffff80080cb218>] get_online_cpus+0x48/0xa8
[ 2.971979] #3: (subsys mutex#6){+.+.+.}, at: [<ffffff800850bed4>] subsys_interface_register+0x44/0xc0
[ 2.981411] #4: (&policy->rwsem){+.+.+.}, at: [<ffffff8008720338>] cpufreq_online+0x330/0x76c
[ 2.990065] #5: ((cpufreq_policy_notifier_list).rwsem){.+.+..}, at: [<ffffff80080f3418>] blocking_notifier_call_chain+0x38/0xc4
[ 3.001661] #6: (&rq->lock){-.-.-.}, at: [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c
[ 3.010661] c0
[ 3.010661] c0 stack backtrace:
[ 3.015514] c0 CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.4.6+ #5
[ 3.022864] c0 Hardware name: Spreadtrum SP9860g Board (DT)
[ 3.028402] c0 Call trace:
[ 3.031092] c0 [<ffffff800808b50c>] dump_backtrace+0x0/0x210
[ 3.036716] c0 [<ffffff800808b73c>] show_stack+0x20/0x28
[ 3.041994] c0 [<ffffff8008433310>] dump_stack+0xa8/0xe0
[ 3.047273] c0 [<ffffff80081349e0>] __lock_acquire+0x1e0c/0x2218
[ 3.053243] c0 [<ffffff80081353c0>] lock_acquire+0xe0/0x280
[ 3.058784] c0 [<ffffff8008abfdfc>] _raw_spin_lock+0x44/0x58
[ 3.064407] c0 [<ffffff80081241cc>] cpufreq_notifier_policy+0x2e8/0x37c
[ 3.070983] c0 [<ffffff80080f3458>] blocking_notifier_call_chain+0x78/0xc4
[ 3.077820] c0 [<ffffff8008720294>] cpufreq_online+0x28c/0x76c
[ 3.083618] c0 [<ffffff80087208a4>] cpufreq_add_dev+0x98/0xdc
[ 3.089331] c0 [<ffffff800850bf14>] subsys_interface_register+0x84/0xc0
[ 3.095907] c0 [<ffffff800871fa0c>] cpufreq_register_driver+0x168/0x28c
[ 3.102486] c0 [<ffffff80087272f8>] sprd_cpufreq_probe+0x134/0x19c
[ 3.108629] c0 [<ffffff8008510768>] platform_drv_probe+0x58/0xd0
[ 3.114599] c0 [<ffffff800850de2c>] driver_probe_device+0x1e8/0x470
[ 3.120830] c0 [<ffffff800850e168>] __driver_attach+0xb4/0xb8
[ 3.126541] c0 [<ffffff800850b750>] bus_for_each_dev+0x6c/0xac
[ 3.132339] c0 [<ffffff800850d6c0>] driver_attach+0x2c/0x34
[ 3.137877] c0 [<ffffff800850d234>] bus_add_driver+0x210/0x298
[ 3.143676] c0 [<ffffff800850f1f4>] driver_register+0x7c/0x114
[ 3.149476] c0 [<ffffff8008510654>] __platform_driver_register+0x60/0x6c
[ 3.156139] c0 [<ffffff8008f49f40>] sprd_cpufreq_platdrv_init+0x18/0x20
[ 3.162714] c0 [<ffffff8008082a64>] do_one_initcall+0xd0/0x1d8
[ 3.168514] c0 [<ffffff8008f0bc58>] kernel_init_freeable+0x1fc/0x29c
[ 3.174834] c0 [<ffffff8008ab554c>] kernel_init+0x20/0x12c
[ 3.180281] c0 [<ffffff8008086290>] ret_from_fork+0x10/0x40
Reported-by: Ke Wang <ke.wang@spreadtrum.com>
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
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This is the 4.4.37 stable release
Change-Id: Ic6753a5a223abc02c4fe5205642d4f904de2e5b8
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This is the 4.4.35 stable release
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This is the 4.4.32 stable release
Change-Id: I5028402eadfcf055ac44a5e67abc6da75b2068b3
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This is the 4.4.30 stable release
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Change-Id: I8c5ec371d8b612f6880b2428893bec89d7da71f6
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This is the 4.4.26 stable release
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This is the 4.4.24 stable release
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Change-Id: I203e905e0a63db40a5bb8ee85fcac1e128736331
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This is the 4.4.23 stable release
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Change-Id: I6c4e7f9f47392d4b334f71e2b20f2ccf33827632
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This is the 4.4.22 stable release
Change-Id: Id49e3c87d2cacb2fa85d85a17226f718f4a5ac28
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Change-Id: I049d2e9d238a92d56100e8e317be6688497eb501
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This is the 4.4.21 stable release
Change-Id: I03e47d6fdca8084641c4b4f9658ea0b0edb8f297
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This is the 4.4.20 stable release
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This is the 4.4.19 stable release
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This is the 4.4.17 stable release
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This is the 4.4.16 stable release
Change-Id: Ibaf7b7e03695e1acebc654a2ca1a4bfcc48fcea4
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Add a check for cpu unbound deferrable timer expiry and raise
softirq for handling the expired timers so that the CPU can
process the cpu unbound deferrable times as early as possible
when a cpu tries to enter/exit idle loop.
Change-Id: Ieffa74fa22a4d25493f5590b5ac1e0d784fcbbad
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
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Add Minidump support for clients to get minimum required data
at the time of system crash. The Minidump table resides in SMEM,
BOOT(SBL) will iterate the table entries and dumps out (to USB/Flash)
the data in address location.
Any client can register to this table with static or known addresses,
as currently Minidump doesn't support dumping of dynamic data structures.
To simplify post processing, we create an ELF header, where each entry in
the minidump table is a section in elf header.
If Memory dump table enabled, Dump all data entries registered with MDT.
Enable Minidump:
echo mini > /sys/kernel/dload/dload_mode
Change-Id: I0fc8d21aef71ded34a498426ee3d7f86b063a639
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
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When the need for CPUs is more than the active CPUs and there are some
isolated CPUs, we wakeup the core_ctl thread to unisolate some CPUs.
The core_ctl task can't unisolate any CPU if all of them are isolated
by other clients. Track the number of isolated CPUs by core_ctl and
wakeup the core_ctl task when adjustment is really possible.
Change-Id: I11ef10860532df25cbde572aabd4b925320db8fe
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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The cluster->active_cpus is not updated in eval_need(). The new need
for CPUs is compared against the previous cluster->active_cpus. If
another client isolates a CPU, cluster->active_cpus becomes stale and
we fail to detect the change in need for CPUs.
Change-Id: Ib58b8f0bd03dd2b4a174de2ac54eb0c60c59f9f7
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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We are interested in only CPU_ONLINE and CPU_DEAD notifications. Don't
do anything when other notifications arrive.
Change-Id: Iea2e0e1c93e67ef278ee7c5a9813fbab6cea5c74
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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global_state file output is prepared by reading the members of CPU
and cluster data structures. These members are updated under state_lock,
so acquire the same lock while preparing the output.
Change-Id: I8cb3ca6f9100a24f0bc9b293d364ad6aa8aabefb
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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An error message is printed even when the task's scheduling class
is switched back successfully. Fix the error condition check and
print the error value in the message.
Change-Id: Ib75c4cfa22d58dd9309542e96096ac4e91f0c3db
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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