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

[Ingo Molnar]

* Chris Wedgwood <cw@xxxxxxxx> wrote:

> > The glaring exception is the IDE io completion, which can run for
> > 2000+ usec even with a modern chipset and drive.
> 
> does un-masking irqs help?

no. A 2 msec nonpreemptable delay is a 2 msec delay, irqs on or off
alike.

but it's not a big problem with IRQ threading, there most hardirqs are
preemptable.

	Ingo
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