Andi,
On Wed, Aug 23, 2006 at 12:58:55PM +0200, Andi Kleen wrote:
>
> > +
> > +fastcall void smp_pmu_interrupt(struct pt_regs *regs)
> > +{
>
> This misses enter/exit_idle on x86-64.
>
I have been working on adding idle notifier for i386.
I am wondering about this code:
/* Called from interrupts to signify idle end */
void exit_idle(void)
{
if (current->pid | read_pda(irqcount))
return;
__exit_idle();
}
And in particular the irqcount. I am guessing you are trying
to protect against nested interrupts. In fact, I think we only
want to get notified once the interrupt stack is fully unwound.
because we get way more exit_idle() than enter_idle().
Is there an irqcount mechanism on i386?
Thanks
--
-Stephane
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