Messages in this thread | | | Date | Mon, 12 Mar 2012 23:31:14 +0100 | From | Lennart Poettering <> | Subject | Re: [RFD] cgroup: about multiple hierarchies |
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On Mon, 12.03.12 15:28, Tejun Heo (tj@kernel.org) wrote:
> > Hey, > > On Mon, Mar 12, 2012 at 11:22:18PM +0100, Peter Zijlstra wrote: > > On Mon, 2012-03-12 at 15:10 -0700, Tejun Heo wrote: > > > > > > * How to map controllers which aren't aware of full hierarchy is still > > > an open question but I'm still standing by one active node on any > > > root-to-leaf path w/ root group serving as the special rest group. > > > > What does this mean? > > Let's say we have a tree like the following. > > root > / | \ > G1 G2 G3 > / \ > G31 G32 > > So, for cgroups which don't support full hierarchy, it'll be viewed as > either, > > root > / | \ > G1 G2 G3 > > or > > root > / | | \ > G1 G2 G31 G32 > > With root being treated specially, probably as just being a equal > group as other groups, I'm not fully determined about that yet.
Note that at least systemd places all services by default beneath a single "super" group (/system/), hence the first suggestion would make little sense for us. The second suggestion would be fine however.
Lennart
-- Lennart Poettering - Red Hat, Inc.
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