From: Joerg Roedel <joro@8bytes.org>
To: Jan Beulich <jbeulich@novell.com>
Cc: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com,
Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i386: improve double fault handling
Date: Wed, 23 Jul 2008 23:43:20 +0200 [thread overview]
Message-ID: <20080723214320.GC13662@8bytes.org> (raw)
In-Reply-To: <4880A912.76E4.0078.0@novell.com>
On Fri, Jul 18, 2008 at 01:30:42PM +0100, Jan Beulich wrote:
> Make the double fault handler use CPU-specific stacks. Add some
> abstraction to simplify future change of other exception handlers to go
> through task gates.
What is the benefit of exception handlers going through task gates?
Hardware task switches are not very well supported in virtualization
(e.g. its has issues in KVM and is also not in Xen for a long time).
Joerg
next prev parent reply other threads:[~2008-07-23 21:43 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
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 [this message]
2008-07-24 7:08 ` Jan Beulich
2008-07-24 13:24 ` H. Peter Anvin
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