Fw: Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allow guests to use it

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

My major concern is DomU with

  disk=['phy:/dev/sdb5,xvda,w']

NOT

  disk =['tap:aio:/etc/xen/images/disk.img,xvda,w']
 

--- On Wed, 3/11/09, Boris Derzhavets <bderzhavets@xxxxxxxxx> wrote:

From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] xen: mask XSAVE in cpuid since we don't allow guests to use it
To: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>
Cc: "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
Date: Wednesday, March 11, 2009, 12:27 PM

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.

Boris.



--- 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, 12:09 PM

Boris Derzhavets wrote:
> Blktap helps out for multiple CentOS PV DomU restarts (with image on FS)
under  Suse's 2.6.27 xen-ified kernel & Xen Unstable ( the most recent).
> But it seems not implemented yet for 2.6.29-rc7
> 

So your conclusion is that there's a regression in the tools stack when
using blkback rather than blktab?

   J

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