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Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allo

To: bderzhavets@xxxxxxxxx
Subject: Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allow guests to use it
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 11 Mar 2009 09:50:13 -0700
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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Boris Derzhavets wrote:
It's not so important for me. The important thing is:-

CentOS 5.2 PV DomU may be loaded only the very first time under Suse's 2.6.27 xen-ified kernel & Xen Unstable ( the most recent). Attempt to shutdown and start it again gives VBD cannot be connected . Hotplug scripts not working. That's a core issue, same behavior as under 2.6.29-rc7 (with XSAVE patch ). Kernel doesn't seem to be a root cause.
I believe Xen unstable is broken in some way.

Could you try bisecting xen-unstable to see which change started failing for you? There were some recent changes to the hotplug scripts which could have introduced a problem.

However, I'm pretty sure I started seeing this problem without updating my usermode tools, so there could also be a kernel problem. But its not obvious what it might be.


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