[PATCH 4/4] memcg: force use_hierarchy if sane_behavior
serge.hallyn at ubuntu.com
Mon Apr 15 01:13:36 UTC 2013
Quoting Tejun Heo (tj at kernel.org):
> Turn on use_hierarchy by default if sane_behavior is specified and
> don't create .use_hierarchy file.
> It is debatable whether to remove .use_hierarchy file or make it ro as
> the former could make transition easier in certain cases; however, the
> behavior changes which will be gated by sane_behavior are intensive
> including changing basic meaning of certain control knobs in a few
> controllers and I don't really think keeping this piece would make
> things easier in any noticeable way, so let's remove it.
this actually reminds me of something that's been on my todo list to
report for some time, but I haven't had time to find the source of the
bug... And maybe it's already been reported... but
If I do
echo 1 > memory.use_hierarchy
echo 5000 > memory.limit_in_bytes
echo $$ > tasks
So it seems the hierarchy is being enforced, but not reported in
child limit_in_bytes files.
(Last tested tonight on 3.8.0-17-generic #27-Ubuntu fwiw)
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