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| author | Christoph Lameter <clameter@sgi.com> | 2006-09-25 23:31:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:51 -0700 |
| commit | 39bbcb8f88154c4ac9853baf3f1134af4c987517 (patch) | |
| tree | 79f9867ead896c28d138545089e6d85db426c09f /mm | |
| parent | 006d22d9bbb7e66279ba5cc4556b54eeaf8fd556 (diff) | |
| download | linux-39bbcb8f88154c4ac9853baf3f1134af4c987517.tar.gz linux-39bbcb8f88154c4ac9853baf3f1134af4c987517.tar.bz2 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')
| -rw-r--r-- | mm/page_alloc.c | 5 | ||||
| -rw-r--r-- | mm/vmstat.c | 3 |
2 files changed, 7 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index cc6483047567..f7ea020c23ea 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -633,7 +633,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order, #ifdef CONFIG_NUMA /* * Called from the slab reaper to drain pagesets on a particular node that - * belong to the currently executing processor. + * belongs to the currently executing processor. * Note that this function must be called with the thread pinned to * a single processor. */ @@ -647,6 +647,9 @@ void drain_node_pages(int nodeid) struct zone *zone = NODE_DATA(nodeid)->node_zones + z; struct per_cpu_pageset *pset; + if (!populated_zone(zone)) + continue; + pset = zone_pcp(zone, smp_processor_id()); for (i = 0; i < ARRAY_SIZE(pset->pcp); i++) { struct per_cpu_pages *pcp; 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++) |