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| author | Christoph Lameter | 2006-09-26 08:31:49 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2006-09-26 17:48:51 +0200 |
| commit | 39bbcb8f88154c4ac9853baf3f1134af4c987517 (patch) | |
| tree | 79f9867ead896c28d138545089e6d85db426c09f /mm/vmstat.c | |
| parent | [PATCH] Optimize free_one_page (diff) | |
| download | kernel-qcow2-linux-39bbcb8f88154c4ac9853baf3f1134af4c987517.tar.gz kernel-qcow2-linux-39bbcb8f88154c4ac9853baf3f1134af4c987517.tar.xz kernel-qcow2-linux-39bbcb8f88154c4ac9853baf3f1134af4c987517.zip | |
[PATCH] mm: do not check unpopulated zones for draining and counter updates
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 <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 04a9093f649e..968c0072e19a 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -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++) |