From f0cb3c76ae1ced85f9034480b1b24cd96530ec78 Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Wed, 21 Mar 2012 16:34:06 -0700 Subject: 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 Cc: Dave Hansen Cc: KOSAKI Motohiro Cc: Eric B Munson Cc: Mel Gorman Cc: Christoph Lameter Cc: KAMEZAWA Hiroyuki Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/swap.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/swap.h b/include/linux/swap.h index 64a7dba6784..b86b5c20617 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); -- cgit v1.2.3-70-g09d2