linux-kernel - Re: [RFC] export irq_set/get_affinity() for multiqueue network drivers

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Message-ID: <20080829055023.07966b4a@infradead.org>
Date:	Fri, 29 Aug 2008 05:50:23 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Brice Goglin <Brice.Goglin@...ia.fr>
Cc:	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [RFC] export irq_set/get_affinity() for multiqueue network
 drivers

On Thu, 28 Aug 2008 22:21:53 +0200
Brice Goglin <Brice.Goglin@...ia.fr> wrote:

> Hello,
> 
> Is there any way to setup IRQ masks from within a driver? myri10ge
> currently relies on an external script (writing in
> /proc/irq/*/smp_affinity) to bind each queue/MSI-X to a different
> processor. By default, Linux will either:
> * round-robin the interrupts (killing the benefit of DCA for instance)
> * put all IRQs on the same CPU (killing much of th

* do the right thing with the userspace irq balancer

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