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SubjectRe: 2.6.26-git: NULL pointer deref in __switch_to
Ingo Molnar wrote:
> * Suresh Siddha <suresh.b.siddha@intel.com> wrote:
>
>
>> Somehow (as described below?) TS_USEDFPU is set but the fpu is not
>> allocated or freed.
>>
>> Please try the appended patch.
>>
>
> i've queued up your fix in tip/x86/urgent. (Git access coordinates:
> http://people.redhat.com/mingo/tip.git/README)
>
> i'm wondering why this problem was not hit more frequently. Does it need
> some special FPU use to trigger? Or does it need an exec() with the FPU
> stack still active? (normally the FPU stack is empty at exec() time)

I've recently started running three lguest instances on that machine,
maybe that has something to do with it.




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