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authorGreg Thelen <gthelen@google.com>2011-02-17 04:51:23 +0300
committerJiri Kosina <jkosina@suse.cz>2011-02-17 11:17:21 +0300
commit689bca3bbccd41be7b256e2227ff2fd0d7aed4ee (patch)
tree0e0dc4331d2d6c673aa95f9bf3cbb050294fb64e /Documentation/cgroups
parentc23cf8baf6965fc9bcffb62c92b384b0f0c78eb7 (diff)
downloadlinux-689bca3bbccd41be7b256e2227ff2fd0d7aed4ee.tar.xz
memcg: clarify use_hierarchy documentation
The memcg code does not allow changing memory.use_hierarchy if the parent cgroup has enabled use_hierarchy. Update documentation to match the code. Signed-off-by: Greg Thelen <gthelen@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/memory.txt5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 7781857dc940..b6ed61c95856 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -485,8 +485,9 @@ The feature can be disabled by
# echo 0 > memory.use_hierarchy
-NOTE1: Enabling/disabling will fail if the cgroup already has other
- cgroups created below it.
+NOTE1: Enabling/disabling will fail if either the cgroup already has other
+ cgroups created below it, or if the parent cgroup has use_hierarchy
+ enabled.
NOTE2: When panic_on_oom is set to "2", the whole system will panic in
case of an OOM event in any cgroup.