Messages in this thread | | | Date | Fri, 10 Sep 2004 17:34:21 +0200 | From | Arjan van de Ven <> | Subject | Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option |
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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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