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vmstats: add cond_resched() to refresh_cpu_vm_stats()

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We've found that it can take quite a bit of time (100's of usec) to get
through the zone loop in refresh_cpu_vm_stats().

Adding a cond_resched() to allow other threads to run in the non-preemptive
case.

Signed-off-by: Dimitri Sivanich <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dimitri Sivanich 2008-04-28 02:13:37 -07:00 • committed by Linus Torvalds
commit 468fd62ed9
1 changed files with 1 additions and 0 deletions
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1
mm/vmstat.c
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@ -322,6 +322,7 @@ void refresh_cpu_vm_stats(int cpu)
p->expire = 3;
#endif
}
cond_resched();
#ifdef CONFIG_NUMA
/*
* Deal with draining the remote pageset of this