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>
This commit is contained in:
Родитель
35282a2de4
Коммит
69c8548175
|
@ -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);
|
||||
|
|
Загрузка…
Ссылка в новой задаче