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From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Jan Beulich <jbeulich@novell.com>,
	Andi Kleen <andi@firstfloor.org>,
	tglx@linutronix.de, linux-kernel@vger.kernel.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Joerg Roedel <joro@8bytes.org>
Subject: Re: [PATCH] i386: improve double fault handling
Date: Mon, 28 Jul 2008 09:45:20 -0400	[thread overview]
Message-ID: <488DCD70.4020003@zytor.com> (raw)
In-Reply-To: <20080728134252.GI5515@elte.hu>

Ingo Molnar wrote:
> 
> Secondly, task gates are really a relic that should not be proliferated. 
> Besides the complications in virtualized environments (if more common 
> things like Big Real Mode are not supported well in virtual mode what do 
> we expect of more esoteric features as task gates?) it does not get 
> nearly as much testing on real silicon as other, more mainstream CPU 
> features.
> 

I think that using it as a bailout mechanism is going to remain 
supported and tested.  It's just never going to be fast.

	-hpa


  reply	other threads:[~2008-07-28 13:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-18 12:30 [PATCH] i386: improve double fault handling Jan Beulich
2008-07-18 23:24 ` H. Peter Anvin
2008-07-21  8:54   ` Jan Beulich
2008-07-21 11:05     ` Ingo Molnar
2008-07-22 10:13       ` Jan Beulich
2008-07-28 13:42         ` Ingo Molnar
2008-07-28 13:45           ` H. Peter Anvin [this message]
2008-07-28 13:59           ` Jan Beulich
2008-07-28 14:02             ` H. Peter Anvin
2008-07-28 16:28               ` Ingo Molnar
2008-07-28 22:00           ` Chuck Ebbert
2008-07-31 10:46             ` Ingo Molnar
2008-07-23 21:43 ` Joerg Roedel
2008-07-24  7:08   ` Jan Beulich
2008-07-24 13:24     ` H. Peter Anvin

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