Messages in this thread |  | | Date | Thu, 13 Sep 2012 19:39:58 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH REPOST RFC cgroup/for-3.7] cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them |
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On Thu 13-09-12 10:18:32, Tejun Heo wrote: > Hello, Michal. > > On Thu, Sep 13, 2012 at 02:14:38PM +0200, Michal Hocko wrote: > > I would like to see use_hierarchy go away. The only concern I have is > > to warn only if somebody is doing something wrong (aka flat > > hierarchies). Or better put it this way. Do not warn in cases which do > > not change if use_hierarchy is gone or default changes to 1. > > An example: > > root (use_hierarchy=0) > > | \ > > | A (use_hierarchy=0) > > | > > B (use_hierarachy=1) > > |\ > > C D > > > > is a perfectly sane configuration and I do not see any reason to fill > > logs with some scary warnings when A is created. There will be no > > semantical change in this setup When use_hierchy is gone. > > > > So the only thing I am proposing here is to warn only if something > > should be fixed in the configuration in order to be prepared for fully > > hierarchical (and that is a second level of children from root with > > use_hierachy==0). > > > > Does it make more sense now? > > Ah, okay, so what you're saying is that we shouldn't warn if 0 > .use_hierarchys don't make any behavior difference from when they're > all 1, right?
Exactly. 1st level of children under the root is exactly this kind of setup.
> If so, I have no objection. Will incorporate your updated version.
Thanks!
-- Michal Hocko SUSE Labs
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