The patch titled
vmscan: prevent shrinking of active anon lru list in case of no swap space V3
has been added to the -mm tree. Its filename is
vmscan-prevent-shrinking-of-active-anon-lru-list-in-case-of-no-swap-space-v3.patch
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Subject: vmscan: prevent shrinking of active anon lru list in case of no swap space V3
From: MinChan Kim <minchan.kim@xxxxxxxxx>
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@xxxxxxxxx>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/vmscan.c~vmscan-prevent-shrinking-of-active-anon-lru-list-in-case-of-no-swap-space-v3 mm/vmscan.c
--- a/mm/vmscan.c~vmscan-prevent-shrinking-of-active-anon-lru-list-in-case-of-no-swap-space-v3
+++ a/mm/vmscan.c
@@ -1570,7 +1570,7 @@ static void shrink_zone(int priority, st
* 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);
_
Patches currently in -mm which might be from minchan.kim@xxxxxxxxx are
vmscan-zvc-updates-in-shrink_active_list-can-be-done-once.patch
mm-setup_per_zone_inactive_ratio-fix-comment-and-make-it-__init.patch
vmscan-prevent-shrinking-of-active-anon-lru-list-in-case-of-no-swap-space-v3.patch
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