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Message-Id: <200710020007.09864.ak@suse.de>
Date:	Tue, 2 Oct 2007 00:07:09 +0200
From:	Andi Kleen <ak@...e.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	David Bahi <dbahi@...ell.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-rt-users@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Gregory Haskins <GHaskins@...ell.com>
Subject: Re: nmi_watchdog fix for x86_64 to be more like i386


> OTOH, the accounting hook would allow us to remove the IRQ#0 -> CPU#0
> restriction. Not sure whether it's worth the trouble.

Some SIS chipsets hang the machine when you migrate irq 0 to another
CPU. It's better to keep that Also I wouldn't be surprised if there are some
other assumptions about this elsewhere.

Ok in theory it could be done only on SIS, but that probably would really
not be worth the trouble

-Andi
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