The patch titled
Subject: memcg: disable hierarchy support if bound to the legacy cgroup hierarchy
has been added to the -mm tree. Its filename is
memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy.patch
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------------------------------------------------------
From: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Subject: memcg: disable hierarchy support if bound to the legacy cgroup hierarchy
If the memory cgroup controller is initially mounted in the scope of the
default cgroup hierarchy and then remounted to a legacy hierarchy, it will
still have hierarchy support enabled, which is incorrect. We should
disable hierarchy support if bound to the legacy cgroup hierarchy.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN mm/memcontrol.c~memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy
+++ a/mm/memcontrol.c
@@ -5232,7 +5232,9 @@ static void mem_cgroup_bind(struct cgrou
* on for the root memcg is enough.
*/
if (cgroup_on_dfl(root_css->cgroup))
- mem_cgroup_from_css(root_css)->use_hierarchy = true;
+ root_mem_cgroup->use_hierarchy = true;
+ else
+ root_mem_cgroup->use_hierarchy = false;
}
static u64 memory_current_read(struct cgroup_subsys_state *css,
_
Patches currently in -mm which might be from vdavydov@xxxxxxxxxxxxx are
memcg-disable-hierarchy-support-if-bound-to-the-legacy-cgroup-hierarchy.patch
mm-hotplug-fix-concurrent-memory-hot-add-deadlock.patch
ocfs2-copy-fs-uuid-to-superblock.patch
cleancache-zap-uuid-arg-of-cleancache_init_shared_fs.patch
cleancache-forbid-overriding-cleancache_ops.patch
cleancache-remove-limit-on-the-number-of-cleancache-enabled-filesystems.patch
cleancache-remove-limit-on-the-number-of-cleancache-enabled-filesystems-fix.patch
mm-vmscan-fix-the-page-state-calculation-in-too_many_isolated.patch
linux-next.patch
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