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

[Alan Cox]

On Mer, 2004-10-20 at 17:39, Lee Revell wrote:
> The IDE I/O completion in hardirq context means that one can run for
> almost 3ms.  Apparently at OLS it was decided that the target for
> desktop responsiveness was 1ms.  So this is a real problem.
> 
> What exactly do you mean by "draconian"?

It means "fix the ide layer", patches welcome. 

Doing 4K IRQ stacks is actually not the problem - nor really is nesting.
If that worries you then get_free_page() the irq structure and use the
rest for the stack for _that_ IRQ handler. You won't need that much
memory.

Alan

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