linux-kernel - Re: [tip:perf/core] x86, NMI: Rewrite NMI handler

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Message-ID: <1287390287.29097.1539.camel@twins>
Date:	Mon, 18 Oct 2010 10:24:47 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Don Zickus <dzickus@...hat.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:perf/core] x86, NMI: Rewrite NMI handler

On Mon, 2010-10-18 at 11:06 +0800, Huang Ying wrote:
> You can kill DIE_NMI_IPI. But you will add at least NMI_PRIORITY_LOCAL
> (like DIE_NMI_IPI), NMI_PRIORITY_GLOBAL (like original DIE_NMI). So
> thing is similar, just moved from one place to another place.

The nice thing is that notifier chains aren't limited to 2 priorities,
in fact there's a good argument to use a wider range.

Also, like previously mentioned, it gets rid of the double iteration.

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