diff options
| author | Christoph Lameter <cl@linux.com> | 2016-01-14 15:21:40 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-08-11 14:26:53 -0700 |
| commit | 142b2acc79777f3cac93144d7ebf9caa53e97f9b (patch) | |
| tree | 2b4e243525ef45c0de78c731412cb80c377b68c2 /kernel | |
| parent | 74b4fa8e5cfe7655adb40bc88d6d88f916cee250 (diff) | |
vmstat: make vmstat_updater deferrable again and shut down on idle
Currently the vmstat updater is not deferrable as a result of commit
ba4877b9ca51 ("vmstat: do not use deferrable delayed work for
vmstat_update"). This in turn can cause multiple interruptions of the
applications because the vmstat updater may run at
Make vmstate_update deferrable again and provide a function that folds
the differentials when the processor is going to idle mode thus
addressing the issue of the above commit in a clean way.
Note that the shepherd thread will continue scanning the differentials
from another processor and will reenable the vmstat workers if it
detects any changes.
Change-Id: Idf256cfacb40b4dc8dbb6795cf06b34e8fec7a06
Fixes: ba4877b9ca51 ("vmstat: do not use deferrable delayed work for vmstat_update")
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Git-commit: 0eb77e9880321915322d42913c3b53241739c8aa
[shashim@codeaurora.org: resolve minor merge conflicts]
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>
[jstultz: fwdport to 4.4]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/idle.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index cbc130efbc5b..917c94abf5bb 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -220,6 +220,7 @@ static void cpu_idle_loop(void) */ __current_set_polling(); + quiet_vmstat(); tick_nohz_idle_enter(); while (!need_resched()) { |