Re: [PATCH v2 -tip] sched/rt: Fix locality of threaded interrupthandlers

From: Alexander Gordeev
Date: Thu Feb 14 2013 - 09:32:57 EST

On Mon, Jan 14, 2013 at 03:11:52PM +0100, Alexander Gordeev wrote:
> When a interrupt affinity mask targets multiple CPUs, the
> RT scheduler selects a runqueue for RT task corresponding
> to a threaded interrupt handler without consideration of
> where the interrupt is actually gets delivered. It leads
> to a suboptimal condition when a hardware interrupt handler
> executes on one CPU while the threaded interrupt handler
> executes on another CPU.
> This fix alters the behaviour of threaded handler wake-ups
> by getting priority to a CPU where the hardware interrupt
> handler is executing. As result, most of the time both
> halves of interrupt handling are kept local.

Hi Thomas, Ingo,

Would you ack/consider this patch?


Alexander Gordeev
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