Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option
From: Arjan van de Ven (arjanv_at_redhat.com)
Date: 09/10/04
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Date: Fri, 10 Sep 2004 17:34:21 +0200 To: Andrea Arcangeli <andrea@novell.com>
On Fri, Sep 10, 2004 at 05:28:52PM +0200, Andrea Arcangeli wrote:
> On Fri, Sep 10, 2004 at 05:15:38PM +0200, Arjan van de Ven wrote:
> > because it gives people a reason to do sloppy coding.
>
> it's not about bad drivers, it's about the number of nested interrupts
> not being limited by software right now.
>
> > What we should consider regardless is disable the nesting of irqs for
> > performance reasons but that's an independent matter
>
> disabling nesting completely sounds a bit too aggressive, but limiting
> the nesting is probably a good idea.
disabling is actually not a bad idea; hard irq handlers run for a very short
time, but when they nest you effectively have like a semi context switch in
the middle of the work so performance suffers...
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- Previous message: Lionel Bouton: "Re: [PATCH] sis5513 fix for SiS962 chipset"
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