diff options
| author | Chris Down <[email protected]> | 2020-04-06 20:03:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-04-07 10:43:37 -0700 |
| commit | 4bf173072cd69cb2e059d710429dc6c46c896548 (patch) | |
| tree | 3d787e1193e3444b7cc1a18b7274061576844dc9 | |
| parent | 7e63420847ae5f1036e4f7c42f0b3282e73efbc2 (diff) | |
mm, memcg: bypass high reclaim iteration for cgroup hierarchy root
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 <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Michal Hocko <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/memcontrol.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ca194864d802..9965a77d53e5 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2254,7 +2254,8 @@ 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) |