On Wed, Nov 19, 2014 at 11:29 AM, Andi Kleen <a...@firstfloor.org> wrote:
>
> The exception handlers which use the IST stacks don't necessarily
> set irq count. Maybe they should.
Hmm. I think they should. Since they clearly must not schedule, as
they use a percpu stack.
Which exceptions use IST?
[ grep grep ]
Looks like stack, doublefault, nmi, debug and mce. And yes, I really
think they should all raise the irq count if they don't already.
Rather than add random arch-specific "let's check that we're on the
right stack" code to the might-sleep stuff, just use the one we have.
Linus
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