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[PATCH] mm: do not check unpopulated zones for draining and counter updates

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If a zone is unpopulated then we do not need to check for pages that are to
be drained and also not for vm counters that may need to be updated.

Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-09-25 23:31:49 -07:00 • committed by Linus Torvalds
commit 39bbcb8f88
2 changed files with 7 additions and 1 deletions
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3
mm/vmstat.c
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@ -321,6 +321,9 @@ void refresh_cpu_vm_stats(int cpu)
for_each_zone(zone) {
struct per_cpu_pageset *pcp;
if (!populated_zone(zone))
continue;
pcp = zone_pcp(zone, cpu);
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)