memory.force_empty is used to empty a memory cgoup memory before rmdir it, avoid to charge those memory into parent cgroup
when try_to_free_mem_cgroup_pages returns 0, guess there maybe be lots of writeback, so wait. but the waiting and sleep will called in shrink_inactive_list, based on numbers of isolated page, so remove this wait to reduce unnecessary delay Signed-off-by: Li RongQing <[email protected]> --- mm/memcontrol.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4ead5a4817de..35bd43eaa97e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2897,12 +2897,8 @@ static int mem_cgroup_force_empty(struct mem_cgroup *memcg) progress = try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL, true); - if (!progress) { + if (!progress) nr_retries--; - /* maybe some writeback is necessary */ - congestion_wait(BLK_RW_ASYNC, HZ/10); - } - } return 0; -- 2.16.2
