* Re: [PATCH] memcg: clarify use_hierarchy documentation
[not found] <201102170152.p1H1qKli008601@smtp-out.google.com>
@ 2011-02-17 1:57 ` Greg Thelen
0 siblings, 0 replies; only message in thread
From: Greg Thelen @ 2011-02-17 1:57 UTC (permalink / raw)
To: Andrew Morton
Cc: Randy Dunlap, KAMEZAWA Hiroyuki, Daisuke Nishimura, Jiri Kosina,
linux-mm, linux-kernel, Greg Thelen
(cc correct linux-mm address)
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>
---
Documentation/cgroups/memory.txt | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 7781857..b6ed61c 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.
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