From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [PATCH 4/4] Fix task switching.
Date: Mon, 30 Mar 2009 19:21:55 +0300
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References: <20090329141202.30481.91797.stgit@trex.usersys.redhat.com> <20090329141218.30481.92675.stgit@trex.usersys.redhat.com> <49D0ED9D.9080600@web.de>
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Cc: avi@redhat.com, kvm@vger.kernel.org,
	Bernhard Kohl <bernhard.kohl@nsn.com>,
	"Ostler, Thomas (NSN - DE/Munich)" <thomas.ostler@nsn.com>,
	bliitz@users.sourceforge.net
To: Jan Kiszka <jan.kiszka@web.de>
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On Mon, Mar 30, 2009 at 06:04:45PM +0200, Jan Kiszka wrote:
> Gleb Natapov wrote:
> > The patch fixes two problems with task switching.
> > 1. Back link is written to a wrong TSS.
> > 2. Instruction emulation is not needed if the reason for task switch
> >    is a task gate in IDT and access to it is caused by an external even.
> > 
> > 2 is currently solved only for VMX since there is not reliable way to
> > skip an instruction in SVM. We should emulate it instead.
> 
> Does this series fix all issues Bernhard, Thomas and Julian stumbled over?
> 
Haven't tried. I wrote my own tests for task switching. How can I check it?

--
			Gleb.