On a huge mem cgroup mem_cgroup_force_empty_list() may iterate for a long time without rescheduling and cause softlockup. Add cond_resched() to avoid this.
https://jira.sw.ru/browse/PSBM-76011 Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- mm/memcontrol.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index efc455d8ca81..a7fa84a9980a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4038,8 +4038,10 @@ static void mem_cgroup_force_empty_list(struct mem_cgroup *memcg, /* found lock contention or "pc" is obsolete. */ busy = page; schedule_timeout_uninterruptible(1); - } else + } else { busy = NULL; + cond_resched(); + } } while (!list_empty(list)); } -- 2.13.6 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
