linux-kernel - Re: [PATCH 5/8] irq: change irq_desc

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Message-ID: <20090416091008.GH9813@elte.hu>
Date:	Thu, 16 Apr 2009 11:10:08 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/8] irq: change irq_desc_alloc to take node instead cpu


* Yinghai Lu <yinghai@...nel.org> wrote:

> Impact: prepare to make irq_desc_alloc to numa aware
> 
> so could make irq_desc_alloc use node pass down

Yes - this static approach will work far better than dynamically 
migrating IRQ descriptors. IRQ migration is ... fragile, both in 
hardware, and in terms of sw complexity.

	Ingo
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