linux-kernel - Re: [RFC 3/5] x86, trigger NMI return notifier soft

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Message-ID: <1277359408.1875.831.camel@laptop>
Date:	Thu, 24 Jun 2010 08:03:28 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "H.PeterA" <"nvin hpa"@zytor.com>,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>
Subject: Re: [RFC 3/5] x86, trigger NMI return notifier soft_irq earlier

On Thu, 2010-06-24 at 11:04 +0800, Huang Ying wrote:
> soft_irq is used to run NMI return notifiers. But it may be quite long
> from soft_irq is raised in NMI handler to soft_irq is run actually. To
> solve the issue, a self interrupt IPI is used to trigger the soft_irq
> earlier.

This all is just gross hackery,..

wth is wrong with doing what I proposed earlier and use a work_struct
like callback mechanism?


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