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

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allow guests to use it
From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Date: Wed, 11 Mar 2009 09:57:04 -0700 (PDT)
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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Reply-to: bderzhavets@xxxxxxxxx
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>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.
No. It's above me.


--- On Wed, 3/11/09, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allow guests to use it
To: bderzhavets@xxxxxxxxx
Cc: "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
Date: Wednesday, March 11, 2009, 12:50 PM

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.

Thanks,
J

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