The patch titled
Subject: memcg: add comment to mem_cgroup_css_online()
has been added to the -mm tree. Its filename is
mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-fix.patch
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------------------------------------------------------
From: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Subject: memcg: add comment to mem_cgroup_css_online()
Explain relationships between allocation and expanding.
Link: http://lkml.kernel.org/r/521f9e5f-c436-b388-fe83-4dc870bfb489@xxxxxxxxxxxxx
Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Suggested-by: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/memcontrol.c~mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-fix
+++ a/mm/memcontrol.c
@@ -4469,6 +4469,11 @@ static int mem_cgroup_css_online(struct
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
+ /*
+ * A memcg must be visible for memcg_expand_shrinker_maps()
+ * by the time the maps are allocated. So, we allocate maps
+ * here, when for_each_mem_cgroup() can't skip it.
+ */
if (memcg_alloc_shrinker_maps(memcg)) {
mem_cgroup_id_remove(memcg);
return -ENOMEM;
_
Patches currently in -mm which might be from ktkhai@xxxxxxxxxxxxx are
memcg-remove-memcg_cgroup-id-from-idr-on-mem_cgroup_css_alloc-failure.patch
list_lru-combine-code-under-the-same-define.patch
mm-introduce-config_memcg_kmem-as-combination-of-config_memcg-config_slob.patch
mm-assign-id-to-every-memcg-aware-shrinker.patch
mm-assign-id-to-every-memcg-aware-shrinker-v9.patch
memcg-move-up-for_each_mem_cgroup-_tree-defines.patch
mm-assign-memcg-aware-shrinkers-bitmap-to-memcg.patch
mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-v9.patch
mm-assign-memcg-aware-shrinkers-bitmap-to-memcg-fix.patch
mm-refactoring-in-workingset_init.patch
mm-refactoring-in-workingset_init-v9.patch
fs-refactoring-in-alloc_super.patch
fs-propagate-shrinker-id-to-list_lru.patch
list_lru-add-memcg-argument-to-list_lru_from_kmem.patch
list_lru-pass-dst_memcg-argument-to-memcg_drain_list_lru_node.patch
list_lru-pass-lru-argument-to-memcg_drain_list_lru_node.patch
mm-export-mem_cgroup_is_root.patch
mm-set-bit-in-memcg-shrinker-bitmap-on-first-list_lru-item-apearance.patch
mm-set-bit-in-memcg-shrinker-bitmap-on-first-list_lru-item-apearance-v9.patch
mm-iterate-only-over-charged-shrinkers-during-memcg-shrink_slab.patch
mm-iterate-only-over-charged-shrinkers-during-memcg-shrink_slab-v9.patch
mm-add-shrink_empty-shrinker-methods-return-value.patch
mm-clear-shrinker-bit-if-there-are-no-objects-related-to-memcg.patch
mm-clear-shrinker-bit-if-there-are-no-objects-related-to-memcg-v9.patch
mm-move-check-for-shrinker_numa_aware-to-do_shrink_slab.patch
mm-keep-int-fields-in-struct-shrink_control-together.patch
mm-make-flags-of-unsigned-type-in-struct-shrinker.patch
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