Re: [PATCH] Fix x86_64 page fault scheduler race

[Ingo Molnar]

* Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx> wrote:

> You are right in that x86_64 does not seems to play as safely as 
> x86_32 on this matter; it uses current->mm. Probably it shouldn't 
> assume "current" is valid. Actually, I don't see where x86_64 disables 
> interrupts around __switch_to, so this would seem to be a race 
> condition. Or have I missed something ?

the scheduler disables interrupts around __switch_to(). (x86 does not 
set __ARCH_WANT_INTERRUPTS_ON_CTXSW)

	Ingo
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