Messages in this thread | | | Date | Mon, 15 Jan 2007 15:40:37 +0530 | From | Balbir Singh <> | Subject | Re: [ckrm-tech] [PATCH 1/1] Fix a panic while mouting containers on powerpc and some other small cleanups (Re: [PATCH 4/6] containers: Simple CPU accounting container subsystem) |
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Paul Menage wrote: > On 1/15/07, Balbir Singh <balbir@in.ibm.com> wrote: >> While writing/extending the cpuacct container, I found it useful to >> know if the container resource group we are controlling is really mounted. >> Controllers can try and avoid doing work when not mounted and start >> when the subsystem is mounted. Also, without these callbacks, one has no >> definite way of checking if the top_container is dummy or for real. >> > > That's somewhat intentional - my aim was that the controllers > shouldn't really care whether they're connected to the default > hierarchy or have been bound to some mounted hierarchy. Having said > thay, they can determine it by checking <foo>_subsys.hierarchy if they > really want to. If that's 0 then they're in the default hierarchy (and > can assume that all tasks are in one top-level container). >
That makes sense, the only additional thing required is to know when the subsystem really got mounted (we cannot keep polling hierarchy for it:-))
> Paul
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Balbir Singh, Linux Technology Center, IBM Software Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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