Re: [OOPS] hotplugging cpus via /sys/devices/system/cpu/

From: Christopher Beppler
Date: Fri Sep 09 2005 - 16:46:33 EST


Ashok Raj wrote:
> On Fri, Sep 09, 2005 at 01:41:58PM -0700, Christopher Beppler wrote:
>
>> [1.] One line summary of the problem:
>> If I deactivate a CPU with /sys/devices/system/cpux and try to
>> reactivate it, then the CPU doesn't start and the kernel prints out an
>> oops.
>>
>
>
> Could you try this on 2.6.13-mm2? If this is due to a sending broadcast
> IPI related issue that should fix the problem.

No... the oops occurs furthermore...

> I should say i didnt try i386 in a while
> but i suspect some of the recent suspend/resume code required some
> modifications to the i386 hotplug code which might be getting in the way
> if you just try logical cpu hotplug alone without using it for suspend/resume.
>
> Shaohua might know more about the status.
>
> Cheers,
> ashok
>
>

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