vmstats: add cond_resched() to refresh_cpu_vm_stats()
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 <sivanich@sgi.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 4c21670..ec6035e 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -322,6 +322,7 @@
p->expire = 3;
#endif
}
+ cond_resched();
#ifdef CONFIG_NUMA
/*
* Deal with draining the remote pageset of this