Re: [PATCH v2 0/7] CPU hotplug, cpusets: Fix issues with cpusetshandling upon CPU hotplug

[Nishanth Aravamudan]

On 04.05.2012 [22:56:21 +0200], Peter Zijlstra wrote:
> On Fri, 2012-05-04 at 13:46 -0700, Nishanth Aravamudan wrote:
> > What about other users of cpusets (what are they?)? 
> 
> cpusets came from SGI, its traditionally used to partition _large_
> machines. Things like the batch/job-schedulers that go with that type of
> setup use it.

Yeah, I recall that usage (or some description similar). Do we have any
other known users of cpusets (beyond libvirt)?

> I've no clue why libvirt uses it (or why one would use libvirt for that
> matter).

Well, it is the case that libvirt does use it, and libvirt is used
pretty widely (or so it seems to me). I don't use it (cpusets or libvirt
:) either, but it seems like we should either tell libvirt directly that
cpusets are inappropriate for their use-case (once we figure out what
exactly that is, and why they chose cpusets) or work with them to
support their use-case?

Thanks,
Nish

-- 
Nishanth Aravamudan <nacc@xxxxxxxxxx>
IBM Linux Technology Center

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