The commit is pushed to "branch-rh7-3.10.0-693.11.6.vz7.42.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-693.11.6.vz7.42.4
------>
commit 2895afbad160712b498bce58b1284a2197edb752
Author: Andrey Ryabinin <aryabi...@virtuozzo.com>
Date: Wed Jan 31 18:29:34 2018 +0300
mm/vmscan: call wait_iff_congested() only if we have troubles in recaliming
Even if zone congested it might be better to continue reclaim as we
may allocate memory from another zone. So call in wait_iff_congested()
only if we have troubles in reclaiming memory.
https://jira.sw.ru/browse/PSBM-61409
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
mm/vmscan.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d71fa15a1750..4922f734cdb4 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2481,7 +2481,8 @@ static void shrink_zone(struct zone *zone, struct
scan_control *sc,
* is congested. Allow kswapd to continue until it starts
encountering
* unqueued dirty pages or cycling through the LRU too quickly.
*/
- if (!sc->hibernation_mode && !current_is_kswapd())
+ if (sc->priority < (DEF_PRIORITY - 2) && !sc->hibernation_mode
&&
+ !current_is_kswapd())
wait_iff_congested(zone, BLK_RW_ASYNC, HZ/10);
if (reclaim_state) {
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