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 /include/linux/swap.h | |
| parent | mm: fix move/migrate_pages() race on task struct (diff) | |
| download | linux-dev-f0cb3c76ae1ced85f9034480b1b24cd96530ec78.tar.xz linux-dev-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 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 64a7dba67840..b86b5c20617d 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -223,6 +223,7 @@ extern void lru_add_page_tail(struct zone* zone, extern void activate_page(struct page *); extern void mark_page_accessed(struct page *); extern void lru_add_drain(void); +extern void lru_add_drain_cpu(int cpu); extern int lru_add_drain_all(void); extern void rotate_reclaimable_page(struct page *page); extern void deactivate_page(struct page *page); |