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-ia64-devel] domU stability

To: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Subject: Re: [Xen-ia64-devel] domU stability
From: Matt Chapman <matthewc@xxxxxxxxxxxxxxx>
Date: Wed, 16 Nov 2005 16:07:03 +1100
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx, Tristan Gingold <Tristan.Gingold@xxxxxxxx>
Delivery-date: Wed, 16 Nov 2005 05:07:19 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <516F50407E01324991DD6D07B0531AD57E8187@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-ia64-devel-request@lists.xensource.com?subject=help>
List-id: Discussion of the ia64 port of Xen <xen-ia64-devel.lists.xensource.com>
List-post: <mailto:xen-ia64-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=unsubscribe>
References: <516F50407E01324991DD6D07B0531AD57E8187@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.9i
On Tue, Nov 15, 2005 at 06:50:20AM -0800, Magenheimer, Dan (HP Labs Fort 
Collins) wrote:
> > >From: Tristan Gingold
> > >
> > >I am trying xen-ia64-unstable.hg using changeset 7729.  Dom0 
> > works well.
> > >However, domU seems pretty unstable: I got a lot of bad mpa:
> > >However, I was able to log on domU (after many tries).
> > >Has any of you the same errors or is it ok ?
> > 
> > Hi, Tristan,
> >     That warning is harmless, and currently the grant table 
> > pfn is hard code at 0x10000000000 in guest physical, which is 
> > out of normal guest memory range. When be/fe driver 
> > communicates, grant table entries are touched and then you 
> > saw above warnings.
> They do not seem to cause any problems but
> I'm not entirely sure they are harmless.  I think these addresses
> are domU grant table entries that should be translated to
> virtual addresses and shouldn't find their way to
> translate_domain_pte.
> Matt, can you comment?

Yes, as Kevin explains, this is how it's meant to work - the
grant table is currently mapped into guest physical space at
that address, above the top of normal guest physical memory.

Even if the guest kernel access it through a virtual mapping,
the translation process still goes through translate_domain_pte
and hence results in that warning (which should be harmless).


Xen-ia64-devel mailing list

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