Re: [Xen-devel] [BUG] Xen vm kernel crash in get_free_entries.

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Oct 16, 2013 at 02:29:07PM +0100, David Vrabel wrote:
> On 16/10/13 07:28, Astarta wrote:
> > Hello,
> > 
> > This is a some kind of a follow up to the
> > http://lists.xen.org/archives/html/xen-devel/2013-09/msg03109.html (
> > Linux 3.11.1 HVM guest kernel crash when started with xl
> > (get_free_entries)).
> > 
> > Looks like we've here the similar issue.
> > 
> > Xen VM with 3.8.13 kernel crashes in get_free_entries (kernel BUG at
> > drivers/xen/grant-table.c:1181!), i.e in:
> > BUG_ON(grefs_per_grant_frame == 0);. 3.11.5 kernel behaves in exactly
> > the same way.
> > 
> > Whole kernel log is attached. It does not contain  any "Grant tables
> > using version" message.
> > 
> > Seems that gnttab_request_version() has was never executed, so
> > grefs_per_grant_frame was never set.
> > 
> > Could you please advice on this issue?
> 
> I think you're missing the platform pci device required for PVHVM.
> What's your VM's xl.cfg?
> 

Yes, exactly, I had "xen_platform_pci=0" in my VM's xl.cfg,
and I assume Astarta has aswell.

That is because I wanted to test *without* PVHVM, and that is a valid 
configuration imho..
(and works OK with xm/xend).

-- Pasi


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