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Re: [Xen-devel] Xen unstable crash on grant table debug output

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen unstable crash on grant table debug output
From: Andre Przywara <andre.przywara@xxxxxxx>
Date: Tue, 9 Mar 2010 15:39:40 +0100
Cc: "Seidel, Conny" <Conny.Seidel@xxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Keir Fraser wrote:
> changeset 21017:   83a8e561f3ff
> Fix grant table debug key.
> Must skip domains with gt_version==0.
> Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>

Thanks Keir,
that fixes the issue for me.


> Andre Przywara wrote:
> we see a crash of recent Xen unstable on various machines while dumping > the "grant table usage" debug information ("# xm debug g" or 3*Ctrl+A g)
> (XEN) ****************************************
> (XEN) Panic on CPU 7:
> (XEN) Assertion 'gt->gt_version != 0' failed at grant_table.c:216
> (XEN) ****************************************
> (XEN) ...
> (XEN) Manual reset required ('noreboot' specified)
> To reproduce:
> * start Xen unstable HV (tried 2.6.18 Dom0)
> * start a guest (we only tried HVM guests), letting them idle in grub
>  suffices
> * # xm debug g
> I haven't had time to investigate this (and am not very familiar with > that part of the code), so any help is appreciated.

Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
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