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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-09-21 17:01:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:30 -0700
commita26f5320c4ee3d46a0da48fa0f3ac6a00b575793 (patch)
tree76e4502dae5d278c9a3cebbeda53f01aa1cf3e67
parent74a1c48fb4e9f10e3c83dcd39af73487968e35bf (diff)
vmscan: kill unnecessary prefetch
The pages in the list passed move_active_pages_to_lru() are already touched by shrink_active_list(). IOW the prefetch in move_active_pages_to_lru() don't populate any cache. it's pointless. This patch remove it. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/vmscan.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 20c5fa8eca4..e219b47fc50 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1273,7 +1273,6 @@ static void move_active_pages_to_lru(struct zone *zone,
while (!list_empty(list)) {
page = lru_to_page(list);
- prefetchw_prev_lru_page(page, list, flags);
VM_BUG_ON(PageLRU(page));
SetPageLRU(page);