From: Andrey Ryabinin <aryabi...@virtuozzo.com> shrink_slab_memcg() may iterate for a long time without resched if we have many memcg with small amount of objects. Add cond_resched() to avoid potential softlockup.
https://jira.sw.ru/browse/PSBM-125095 Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> Reviewed-by: Kirill Tkhai <ktk...@virtuozzo.com> (cherry picked from vz7 commit c2ccf83304f1 ("mm/vmscan: add cond_resched() to loop in shrink_slab_memcg()")) Signed-off-by: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> (cherry picked from vz8 commit 5af0061feb0f264d1ad23580f5febe0bd10a154d) Signed-off-by: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> --- mm/vmscan.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index dfc094c..26e12df 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -766,6 +766,8 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, }; struct shrinker *shrinker; + cond_resched(); + shrinker = idr_find(&shrinker_idr, i); if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { if (!shrinker) -- 1.8.3.1 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
