linux-kernel - Re: NMI watchdog + NOHZ question

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Message-ID: <20090624075342.GL6760@one.firstfloor.org>
Date:	Wed, 24 Jun 2009 09:53:42 +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

> > Ah you have a one shot timer and it gets rescheduled in the softirq?
> > If yes why not in doing that directly in the hardirq handler?
> 
> Then what's the point of the generic timer code supporting one-shot
> clock sources? :-)

Well it would avoid that problem at least (I think based on your
description). Somehow you need to reschedule the timer before the softirq.

I guess you could have a generic function that is callable from hardirq
directly?

-Andi

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