The patch titled
mm: align vmstat_work's timer
has been added to the -mm tree. Its filename is
mm-align-vmstat_works-timer.patch
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------------------------------------------------------
Subject: mm: align vmstat_work's timer
From: Anton Blanchard <anton@xxxxxxxxx>
Even though vmstat_work is marked deferrable, there are still benefits to
aligning it. For certain applications we want to keep OS jitter as low as
possible and aligning timers and work so they occur together can reduce
their overall impact.
Signed-off-by: Anton Blanchard <anton@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN mm/vmstat.c~mm-align-vmstat_works-timer mm/vmstat.c
--- a/mm/vmstat.c~mm-align-vmstat_works-timer
+++ a/mm/vmstat.c
@@ -984,7 +984,7 @@ static void vmstat_update(struct work_st
{
refresh_cpu_vm_stats(smp_processor_id());
schedule_delayed_work(&__get_cpu_var(vmstat_work),
- sysctl_stat_interval);
+ round_jiffies_relative(sysctl_stat_interval));
}
static void __cpuinit start_cpu_timer(int cpu)
@@ -992,7 +992,8 @@ static void __cpuinit start_cpu_timer(in
struct delayed_work *vmstat_work = &per_cpu(vmstat_work, cpu);
INIT_DELAYED_WORK_DEFERRABLE(vmstat_work, vmstat_update);
- schedule_delayed_work_on(cpu, vmstat_work, HZ + cpu);
+ schedule_delayed_work_on(cpu, vmstat_work,
+ __round_jiffies_relative(HZ, cpu));
}
/*
_
Patches currently in -mm which might be from anton@xxxxxxxxx are
origin.patch
mm-align-vmstat_works-timer.patch
random-align-rekey_works-timer.patch
sunrpc-align-cache_clean-works-timer.patch
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