linux-kernel - Re: NMI watchdog + NOHZ question

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Message-ID: <20090624070315.GH6760@one.firstfloor.org>
Date:	Wed, 24 Jun 2009 09:03:15 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	David Miller <davem@...emloft.net>
Cc:	andi@...stfloor.org, linux-kernel@...r.kernel.org,
	sparclinux@...r.kernel.org
Subject: Re: NMI watchdog + NOHZ question

> I'm not exactly sure what to do about this.

Ack the timer interrupt earlier (and also give it a high priority?)

That could be still problematic if you have non nestabled irq stacks
(haven't checked if sparc has that or not), 
potentially you might need to run the softirq on the process stack.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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