Messages in this thread | | | Date | Thu, 29 Jul 2004 16:57:50 -0400 | Subject | Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch | From | Scott Wood <> |
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On Thu, Jul 29, 2004 at 10:26:30PM +0200, Pavel Machek wrote: > Well, I do not follow you I guess. > > With large-enough number of hardirqs you do no progress at all. > > Even if only "sane" number of irqs, if they all decide to hit within one > getpid(), this getpid is going to take quite long.... > Pavel
Ordinarily, yes. However, if it's a high-priority RT task that does the getpid(), whose priority is higher than that of the RT tasks, you'll get at most one hardirq stub per active IRQ number; after that, the IRQs will be masked until their threads get a chance to be scheduled.
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