linux-kernel - Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes

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Message-ID: <20081106093020.GH4890@elte.hu>
Date:	Thu, 6 Nov 2008 10:30:20 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Andi Kleen <andi@...stfloor.org>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	Cyrill Gorcunov <gorcunov@...il.com>,
	Alexander van Heukelum <heukelum@...lshack.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>, lguest@...abs.org,
	jeremy@...source.com, Steven Rostedt <srostedt@...hat.com>,
	Mike Travis <travis@....com>
Subject: Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes


* H. Peter Anvin <hpa@...or.com> wrote:

> Ingo Molnar wrote:
>>
>> yes, the accessed bit in the segment descriptor has to be updated 
>> in an atomic transaction: the CPU has to do a MESI coherent 
>> read+compare+write transaction, without damaging other updates to 
>> the 6 bytes segment descriptor.
>
> 8 bytes, rather.

heh, yes of course :-)

	Ingo
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