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Subject: Re: [RFC 3/5] x86, trigger NMI return notifier soft_irq earlier
From: Peter Zijlstra <peterz@infradead.org>
To: Huang Ying <ying.huang@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, "H.PeterA" <"nvin hpa"@zytor.com>,
       linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>
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Date: Thu, 24 Jun 2010 08:03:28 +0200
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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?