Re: [Xen-devel] [PATCH] Avoid race when moving cpu between cpupools

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

Looks good -- thanks Juergen.

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

 -George

On Thu, Feb 24, 2011 at 2:08 PM, Andre Przywara <andre.przywara@xxxxxxx> wrote:
> Juergen Gross wrote:
>>
>> Moving cpus between cpupools is done under the schedule lock of the moved
>> cpu.
>> When checking a cpu being member of a cpupool this must be done with the
>> lock
>> of that cpu being held.
>
> I have reviewed and tested the patch. It fixes my problem. My script has
> been running for several hundred iterations without any Xen crash, whereas
> without the patch the hypervisor crashed mostly at the second iteration.
>
> Thanks Juergen and George for the persistent work!
>
>> Hot-unplugging of physical cpus might encounter the same problems, but
>> this
>> should happen only very rarely.
>>
>> Signed-off-by: juergen.gross@xxxxxxxxxxxxxx
>
> Acked-by: Andre Przywara <andre.przywara@xxxxxxx>
>
> Keir, please apply for 4.1.0.
>
>
> Regards,
> Andre.
>
> --
> Andre Przywara
> AMD-Operating System Research Center (OSRC), Dresden, Germany
>
>
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