linux-kernel - Re: [PATCH 2/3] x86: Remove cmpxchg from i386 NMI nesting code

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Message-ID: <4FD238CD.8000601@zytor.com>
Date:	Fri, 08 Jun 2012 10:39:25 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/3] x86: Remove cmpxchg from i386 NMI nesting code

On 06/08/2012 10:36 AM, Steven Rostedt wrote:
>>
>> On i386 it's infinite, but again, I don't think the code will ever be
>> exercised on i386.  I'm much more concerned about performance on current
>> processors.
> 
> I'm not worried about non i386 here. Some context missing from the patch
> is that this code is surrounded by:
> 

Sorry, I meant i386 as in actual i386 processors, as opposed to modern
processors in 32-bit mode.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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