The patch titled
Subject: mm, memcg: bypass high reclaim iteration for cgroup hierarchy root
has been added to the -mm tree. Its filename is
mm-memcg-bypass-high-reclaim-iteration-for-cgroup-hierarchy-root.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcg-bypass-high-reclaim-iteration-for-cgroup-hierarchy-root.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcg-bypass-high-reclaim-iteration-for-cgroup-hierarchy-root.patch
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------------------------------------------------------
From: Chris Down <chris@xxxxxxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200312164137.GA1753625@xxxxxxxxxxxxxx
Signed-off-by: Chris Down <chris@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/memcontrol.c~mm-memcg-bypass-high-reclaim-iteration-for-cgroup-hierarchy-root
+++ a/mm/memcontrol.c
@@ -2246,7 +2246,8 @@ static void reclaim_high(struct mem_cgro
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)
_
Patches currently in -mm which might be from chris@xxxxxxxxxxxxxx are
mm-memcg-fix-corruption-on-64-bit-divisor-in-memoryhigh-throttling.patch
mm-memcg-throttle-allocators-based-on-ancestral-memoryhigh.patch
mm-memcg-prevent-memoryhigh-load-store-tearing.patch
mm-memcg-prevent-memorymax-load-tearing.patch
mm-memcg-prevent-memorylow-load-store-tearing.patch
mm-memcg-prevent-memorymin-load-store-tearing.patch
mm-memcg-prevent-memoryswapmax-load-tearing.patch
mm-memcg-prevent-mem_cgroup_protected-store-tearing.patch
mm-memcg-bypass-high-reclaim-iteration-for-cgroup-hierarchy-root.patch
