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| author | Michal Hocko <mhocko@suse.com> | 2016-02-05 15:36:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-05 18:10:40 -0800 |
| commit | ccde8bd4014eb2f01102f7a64f0fad3df193b758 (patch) | |
| tree | fd5dc287e1bbd2088841551079e389ed75b37993 /mm/vmstat.c | |
| parent | f01f17d3705bb6081c9e5728078f64067982be36 (diff) | |
| download | lwn-ccde8bd4014eb2f01102f7a64f0fad3df193b758.tar.gz lwn-ccde8bd4014eb2f01102f7a64f0fad3df193b758.zip | |
vmstat: make vmstat_update deferrable
Commit 0eb77e988032 ("vmstat: make vmstat_updater deferrable again and
shut down on idle") made vmstat_shepherd deferrable. vmstat_update
itself is still useing standard timer which might interrupt idle task.
This is possible because "mm, vmstat: make quiet_vmstat lighter" removed
cancel_delayed_work from the quiet_vmstat.
Change vmstat_work to use DEFERRABLE_WORK to prevent from pointless
wakeups from the idle context.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 1543f64df3e6..084c6725b373 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1512,7 +1512,7 @@ static void __init start_shepherd_timer(void) int cpu; for_each_possible_cpu(cpu) - INIT_DELAYED_WORK(per_cpu_ptr(&vmstat_work, cpu), + INIT_DEFERRABLE_WORK(per_cpu_ptr(&vmstat_work, cpu), vmstat_update); if (!alloc_cpumask_var(&cpu_stat_off, GFP_KERNEL)) |