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

[Lee Revell]

On Wed, 2004-10-20 at 12:50, Andrea Arcangeli wrote:
> On Wed, Oct 20, 2004 at 12:39:06PM -0400, 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.
> 
> comparing netsted irqs to a context switch is a red herring.

This was not my point, I agree that the two have nothing to do with each
other.  But if a hardirq handler runs for 3ms then no user code can run
for 3ms.  Therefore this is a problem if our goal for desktop response
is 1ms.

Lee

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