Subject: Re: wiki page (was: Re: [linux-audio-user] dipping toes in 2.6 waters)
From: anahata (anahata_AT_treewind.co.uk)
Date: Wed Aug 11 2004 - 00:18:57 EEST
On Tue, Aug 10, 2004 at 10:33:56PM +0200, Florian Schmidt wrote:
> i get to the conclusion that there indeed was a hierarchy of IRQ's in
> the traditional IRQ handlers in linux. I think this priority is located
> in the PIC itself. I just don't know exactly how to understand the
> implications. Does this priority only apply to irqs which happen to
> happen on the exact same pci bus cycle?
I think ithere's a bigger window than that. If two IRQs happen any time
while interrupts are disabled during the service routine for another
interrupt, the higher priority one gets executed when interrupts
are re-enabled.
-- Anahata anahata_AT_treewind.co.uk -+- http://www.treewind.co.uk Home: 01638 720444 Mob: 07976 263827
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