Messages in this thread | | | Date | Mon, 3 Mar 2008 21:26:42 -0800 | From | "Paul Menage" <> | Subject | Re: [RFC/PATCH] cpuset: cpuset irq affinities |
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On Mon, Mar 3, 2008 at 10:52 AM, Paul Jackson <pj@sgi.com> wrote: > Paul M wrote: > > It ... would allow memory and CPU assignments to be controlled > > independently. > > Could you motivate this suggestion -- who needs it, or why > would is it needed?
My impression was that Peter wanted to be able to control the assignments of CPUs to IRQs in a way that could result in overlapping. One of the arguments that you posted against his proposal was that this would break due to the memory overlap requirements of mem_exclusive cpusets. So this appeared to be a case where the fact that memory and cpu masks are combined in the same cgroups subsystem is a drawback. (But maybe I'm misunderstanding the discussion).
I'm sure if cpusets were being developed today on top of cgroups, rather than being its inspiration, there would be no good reason to have the memory mask assignment and the cpu mask assignment be part of the same subsystem - they're only together now because there was no general grouping mechanism in the kernel when cpusets was written.
Paul
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