Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option

[Ingo Molnar]

* Chris Wedgwood <cw@xxxxxxxx> wrote:

> > but it's not a big problem with IRQ threading, there most hardirqs
> > are preemptable.
> 
> most?  what determines which and when?

it depends on how it uses spinlocks. E.g. most of the IDE irq handler
can run preemptible. Check out the voluntary-preempt patches (and VP
discussions on lkml).

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/