By commit "memcg: move charges to root cgroup if use_hierarchy=0"
mem_cgroup_move_parent() only returns -EBUSY, -EINVAL.
So, we can remove -ENOMEM and -EINTR checks.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
mm/memcontrol.c | 5 -----
1 files changed, 0 insertions(+), 5 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index cf8a0f6..726b7c6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3847,8 +3847,6 @@ 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/* found lock contention or "pc" is obsolete. */
@@ -3910,9 +3908,6 @@ 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);
--
1.7.4.1
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