提交 7feee590 编写于 作者: V Vladimir Davydov 提交者: Linus Torvalds

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: NVladimir Davydov <vdavydov@parallels.com>
Signed-off-by: NJohannes Weiner <hannes@cmpxchg.org>
Acked-by: NMichal Hocko <mhocko@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 a5a6579d
...@@ -5232,7 +5232,9 @@ static void mem_cgroup_bind(struct cgroup_subsys_state *root_css) ...@@ -5232,7 +5232,9 @@ static void mem_cgroup_bind(struct cgroup_subsys_state *root_css)
* on for the root memcg is enough. * on for the root memcg is enough.
*/ */
if (cgroup_on_dfl(root_css->cgroup)) 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, static u64 memory_current_read(struct cgroup_subsys_state *css,
......
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