linux-kernel - Re: [PATCH v2 1/2] x86: skip migrating IRQF_PER_CPU irq in fixup

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Date:	Mon, 9 May 2011 14:39:04 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
cc:	"Tian, Kevin" <kevin.tian@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	Ian Campbell <Ian.Campbell@...citrix.com>,
	"JBeulich@...ell.com" <JBeulich@...ell.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH v2 1/2] x86: skip migrating IRQF_PER_CPU irq in
 fixup_irqs

On Fri, 6 May 2011, Konrad Rzeszutek Wilk wrote:
> On Fri, May 06, 2011 at 02:43:36PM +0800, Tian, Kevin wrote:
> > because Xen event chip silently fails the set_affinity ops, and
> > logically IRQF_PER_CPU should be recognized here.
> 
> OK, so what if the set_affinity ops was implemented?

An interrupt chip which has a set_affinity op should not mark
something per cpu, which implies that the irq CANNOT be moved.

Thanks,

	tglx
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