This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] xm save + restore crashes Windows 2008 32-bit (4.0.2-rc2

To: "Tim Deegan" <Tim.Deegan@xxxxxxxxxx>
Subject: RE: [Xen-devel] xm save + restore crashes Windows 2008 32-bit (4.0.2-rc2-pre)
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Tue, 25 Jan 2011 22:01:55 +1100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 25 Jan 2011 03:03:03 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20110125105313.GC13241@xxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <AEC6C66638C05B468B556EA548C1A77D01BB9269@trantor> <20110125092440.GA13241@xxxxxxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D01BB927B@trantor> <20110125103938.GB13241@xxxxxxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D01BB927D@trantor> <20110125105313.GC13241@xxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acu8fidrVyEsQw+7S0mpezPgYnIrHQAAPwPA
Thread-topic: [Xen-devel] xm save + restore crashes Windows 2008 32-bit (4.0.2-rc2-pre)
> At 10:43 +0000 on 25 Jan (1295952215), James Harper wrote:
> > > > I should know if the problem exists on intel very soon. I'm
> > not
> > > > or I wouldn't be the first one posting about it... either that
> > there
> > > > is something else going on.
> > >
> > > It was on AMD that I saw it too.  If I read them correctly, Ian's
> > > regression tests are passing HVM save/restore for at least some
> > Windows
> > > versions on AMD too, so it may be very specific.
> > >
> >
> > Definitely AMD specific. Works fine on my Intel system.
> >
> > I'm guessing it's missing the save and/or restore of some critical
> > of the CPU state for the domain that causes an immediate crash when
> > return to user mode. Any suggestions as to where to start looking?
> I'm trying to set it up here as well but I'm away from the office and
> getting the VGA console as far as my screen is proving tricky.
> Can you try:
>  - xl pause <domid>
>  - xen-hvmctx <domid> >before
>  - xl save <domid> save-file
>  - xl restore -p save-file
>  - xl list
>  - xen-hvmctx <new-domid> >after
>  - diff -u before after
> There should be a few differences to do with timers and TSCs but there
> might be some other smoking gun.  Of course it's possible that some
> piece of state got added that didn't get into the save/restore code at
> all.  It's also possible that some vital piece of memory isn't getting
> saved properly but that's less likely to be AMD-specific.

I'll give it a go. I tried using some of the xl tools the other day but
it wasn't working. xl save seemed to go okay but xl restore just gave
errors. That might be a clue in itself though... is xl considered stable
for 4.0.2?


Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>