On Tuesday 06 September 2005 18:21, Andi Kleen wrote:
> On Wednesday 07 September 2005 00:19, Daniel Phillips wrote:
> > Andi, their stack will have to have a valid thread_info->task because
> > interrupts will use it. Out of interest, could you please explain what
> > for?
>
> No, with 4k interrupts run on their own stack with their own thread_info
> Or rather they mostly do. Currently do_IRQ does irq_enter which refers
> thread_info before switching to the interrupt stack, that order would
> likely need to be exchanged.
But then how would thread_info->task on the irq stack ever get initialized?
My "what for" question was re why interrupt routines even need a valid
current. I see one answer out there on the web: statistical profiling. Is
that it?
Regards,
Daniel
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