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authorMinChan Kim <minchan.kim@gmail.com>2009-06-16 15:32:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:41 -0700
commit69c854817566db82c362797b4a6521d0b00fe1d8 (patch)
treeb4873e257212659ca0eb224151971e029ce3875d /mm
parent35282a2de4e5e4e173ab61aa9d7015886021a821 (diff)
downloadlinux-69c854817566db82c362797b4a6521d0b00fe1d8.tar.gz
vmscan: prevent shrinking of active anon lru list in case of no swap space V3
shrink_zone() can deactivate active anon pages even if we don't have a swap device. Many embedded products don't have a swap device. So the deactivation of anon pages is unnecessary. This patch prevents unnecessary deactivation of anon lru pages. But, it don't prevent aging of anon pages to swap out. Signed-off-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7592d8eb114..879d034930c 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1570,7 +1570,7 @@ static void shrink_zone(int priority, struct zone *zone,
* Even if we did not try to evict anon pages at all, we want to
* rebalance the anon lru active/inactive ratio.
*/
- if (inactive_anon_is_low(zone, sc))
+ if (inactive_anon_is_low(zone, sc) && nr_swap_pages > 0)
shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0);
throttle_vm_writeout(sc->gfp_mask);