diff options
| author | Konstantin Khlebnikov <khlebnikov@openvz.org> | 2012-03-21 16:34:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 17:54:58 -0700 |
| commit | f0cb3c76ae1ced85f9034480b1b24cd96530ec78 (patch) | |
| tree | 997ae67621f76b3b6bf588604f85738a8c97cbef /mm/page_alloc.c | |
| parent | 3268c63eded4612a3d07b56d1e02ce7731e6608e (diff) | |
| download | lwn-f0cb3c76ae1ced85f9034480b1b24cd96530ec78.tar.gz lwn-f0cb3c76ae1ced85f9034480b1b24cd96530ec78.zip | |
mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug
This cpu hotplug hook was accidentally removed in commit 00a62ce91e55
("mm: fix Committed_AS underflow on large NR_CPUS environment")
The visible effect of this accident: some pages are borrowed in per-cpu
page-vectors. Truncate can deal with it, but these pages cannot be
reused while this cpu is offline. So this is like a temporary memory
leak.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Eric B Munson <ebmunson@us.ibm.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 98552cf1da8b..673596ad9c80 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4825,6 +4825,7 @@ static int page_alloc_cpu_notify(struct notifier_block *self, int cpu = (unsigned long)hcpu; if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { + lru_add_drain_cpu(cpu); drain_pages(cpu); /* |