The root of the hierarchy cannot have high set, so we will never reclaim based on it. This makes that clearer and avoids another entry. Signed-off-by: Chris Down <chris@xxxxxxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Johannes Weiner <hannes@xxxxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: linux-mm@xxxxxxxxx Cc: cgroups@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Cc: kernel-team@xxxxxx --- mm/memcontrol.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 63bb6a2aab81..ab9d24a657b9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2232,7 +2232,8 @@ static void reclaim_high(struct mem_cgroup *memcg, continue; memcg_memory_event(memcg, MEMCG_HIGH); try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true); - } while ((memcg = parent_mem_cgroup(memcg))); + } while ((memcg = parent_mem_cgroup(memcg)) && + !mem_cgroup_is_root(memcg)); } static void high_work_func(struct work_struct *work) -- 2.25.1
