From: Andrey Ryabinin <[email protected]> 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 <[email protected]> Reviewed-by: Kirill Tkhai <[email protected]> (cherry picked from commit c2ccf83304f17a1b116497cabce48a22d18a8df4) Signed-off-by: Andrey Zhadchenko <[email protected]> --- mm/vmscan.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index 24ee7b1..bc1f102 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -561,6 +561,8 @@ 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 == SHRINKER_REGISTERING)) { if (!shrinker) -- 1.8.3.1 _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
