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authorMichal Hocko <mhocko@suse.com>2016-02-05 15:36:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-05 18:10:40 -0800
commitccde8bd4014eb2f01102f7a64f0fad3df193b758 (patch)
treefd5dc287e1bbd2088841551079e389ed75b37993 /mm
parentf01f17d3705bb6081c9e5728078f64067982be36 (diff)
downloadlinux-linaro-stable-ccde8bd4014eb2f01102f7a64f0fad3df193b758.tar.gz
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')
-rw-r--r--mm/vmstat.c2
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))