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

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Message-ID: <4911E042.8040404@zytor.com>
Date:	Wed, 05 Nov 2008 10:04:50 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	Andi Kleen <andi@...stfloor.org>,
	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

Cyrill Gorcunov wrote:
> 
> Ingo, what the conclusion is? As I understand from the thread --
> 
> 1) Implement Peter's proposed cleanup/compress.
> 2) Test Alexander's patche.
> 
> Did I miss something?
> 

Nope, that's pretty much it.

However, there are good reason to believe that using this kind of
segment selector tricks is probably a bad idea in the long term,
especially since CPU vendors have strong incentives to reduce the size
of the segment descriptor cache now when none of the mainstream OSes
rely on more than a small handful of segments.

I was planning to look at doing the obvious stub shrink today.

	-hpa
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