linux-kernel - Re: 2.6.22 x86_64 : kernel initial decompression hangs on vmware

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Message-ID: <46BBC3D6.902@qumranet.com>
Date:	Fri, 10 Aug 2007 04:48:06 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Zachary Amsden <zach@...are.com>
CC:	Gabriel Barazer <gabriel@...va.fr>, Andi Kleen <ak@...e.de>,
	Jim Mattson <jmattson@...are.com>,
	linux-kernel@...r.kernel.org,
	Virtualization Mailing List <virtualization@...ts.osdl.org>,
	kvm-devel <kvm-devel@...ts.sourceforge.net>
Subject: Re: 2.6.22 x86_64 : kernel initial decompression hangs on vmware

Zachary Amsden wrote:
> Avi Kivity wrote:
>>
>> We haven't seen any issue with the 2.6.22 boot decompressor.  Which 
>> of the four (fs, gs, ldt, or tr) were proving problematic and why?
>
> It was tr that was affecting Workstation, since we boot through normal 
> BIOS path, and only a 16-bit task was loaded at this point.
>

Ah.  Maybe we didn't have an exit while we were in long mode with the 
16-bit tss, so VT didn't notice the illegal combination.
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