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memcg: clean up force_empty_list() return value check

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After bf544fdc241da8 "memcg: move charges to root cgroup if
use_hierarchy=0 in mem_cgroup_move_hugetlb_parent()"
mem_cgroup_move_parent() returns only -EBUSY or -EINVAL.  So we can remove
the -ENOMEM and -EINTR checks.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kamezawa Hiroyuki 2012-07-31 16:42:44 -07:00 committed by Linus Torvalds
parent 59b8e85c26
commit d845aa2c75
1 changed files with 0 additions and 5 deletions
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5
mm/memcontrol.c
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@ -3653,8 +3653,6 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *memcg,
pc = lookup_page_cgroup(page);
ret = mem_cgroup_move_parent(page, pc, memcg, GFP_KERNEL);
if (ret == -ENOMEM || ret == -EINTR)
break;
if (ret == -EBUSY || ret == -EINVAL) {
/* found lock contention or "pc" is obsolete. */
@ -3711,9 +3709,6 @@ move_account:
}
mem_cgroup_end_move(memcg);
memcg_oom_recover(memcg);
/* it seems parent cgroup doesn't have enough mem */
if (ret == -ENOMEM)
goto try_to_free;
cond_resched();
/* "ret" should also be checked to ensure all lists are empty. */
} while (res_counter_read_u64(&memcg->res, RES_USAGE) > 0 || ret);