On Mon, 10 Sep 2007 11:45:10 +0200 (CEST) Simon Derr <[email protected]> wrote:
> On Sat, 8 Sep 2007, Nicolas Capit wrote:
>
> > Hello,
> >
> > This is my situation:
> > - I mounted the pseudo cpuset filesystem into /dev/cpuset
> > - I created a cpuset named oar with my 2 cpus
> >
> > cat /dev/cpuset/oar/cpus
> > 0-1
> >
> > - Then I hibernate my computer with 'echo -n "disk" >/sys/power/state'
> > - After reboot:
> >
> > cat /dev/cpuset/oar/cpus
> > 0
> >
> > Why did I lost a cpu?
> > Is this a normal behavior???
>
> Hi Nicolas,
>
> I believe this is related to the fact that hibernation uses the hotplug
> subsystem to disable all CPUs except the boot CPU.
>
> Thus guarantee_online_cpus() is called on each cpuset and removes all
> CPUs, except CPU 0, from all cpusets.
>
> I'm not quite sure about if/how this should be fixed in the kernel,
> though. Looks like a very simple user-land workaround would be enough.
>
Yeah. Bug, surely. But I guess it's always been there.
What are the implications of this for cpusets-via-containers?
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