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authorWei Yang <richard.weiyang@gmail.com>2022-03-23 00:40:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 01:57:02 +0300
commit486bc7060cb510fa60cb85a013d5ed51ce0fe456 (patch)
treeffd3aebe9d08219b5f17c9bc1ad555e63488cf80 /include/linux
parentc857266dca8fe7af3d51343d0f4edf3ba4dd1542 (diff)
downloadlinux-486bc7060cb510fa60cb85a013d5ed51ce0fe456.tar.xz
mm/memcg: retrieve parent memcg from css.parent
The parent we get from page_counter is correct, while this is two different hierarchy. Let's retrieve the parent memcg from css.parent just like parent_cs(), blkcg_parent(), etc. Link: https://lkml.kernel.org/r/20220201004643.8391-2-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Roman Gushchin <guro@fb.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Yang Shi <shy828301@gmail.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/memcontrol.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 8612d7dd0859..ef4b445392a9 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -842,9 +842,7 @@ static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
*/
static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
{
- if (!memcg->memory.parent)
- return NULL;
- return mem_cgroup_from_counter(memcg->memory.parent, memory);
+ return mem_cgroup_from_css(memcg->css.parent);
}
static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,