Re: [win-pv-devel] [SOLVED] RE: xen net/vif (signed 8.2.0.6) "code 10" / win7

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel [mailto:win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On
> Behalf Of Martin Cerveny
> Sent: 09 January 2018 12:08
> To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> Cc: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: [win-pv-devel] [SOLVED] RE: xen net/vif (signed 8.2.0.6) "code 10" /
> win7
> 
> Hello.
> 
> On Tue, 9 Jan 2018, Paul Durrant wrote:
> >> Sent: 08 January 2018 17:30
> >> Captured/attached "boot" debugview:
> >> - when OK
> >> - when "xen-network dialog popup say restart needed"
> >> - when failed
> >
> > Thanks Martin. Much more useful...
> >
> > From the failure case I can see that your guest is running out of grant
> > references. I suspect that, what has happened is you've upgraded your
> > backend OS and suddenly multi-page storage rings have become available
> > in blkback. Your XENVBD driver is then making use of those and stealing
> > most of your VM's grant references. XENVIF is then starting up and
> > finding it doesn't have sufficient grant references to operate correctly
> > and is therefore failing to start.
> >
> > You have a couple of choices... Either increase your VM's grant frame
> > limit (see man xl.cfg for new per-vm parameters in Xen 4.10) or limit
> > your storage backend's rings to a lower number of pages (see modinfo
> > xen-blkback and look for max_ring_page_order... I suggest setting to 0).
> 
> Yes. This should be that. I extended "max_grant_frames=256" in VM config
> (in json in my case, btw. the global settings in /etc/xen/xl.conf does not
> work in my case) and it seems to work now (no more errors
> "XENBUS|GnttabExpand: fail1 (c000009a)").
> 
> > Hmm, it may be possible. I am not sure but the problem could be appearing
> > after upgrade from Xen4.8.0 + 4.7.9-200.fc24 to Xen4.10.0 + 4.13.9-300.fc27.
> 
> Does anyone tests defaults ?

Defaults that we use in XenServer are certainly well tested. For arbitrary 
upstream combinations, no; it's just too big a matrix. I tend to try to run on 
the latest Xen and dom0 to try to spot issues, but my testing is clearly going 
to be quite limited.

  Cheers,

    Paul

_______________________________________________
win-pv-devel mailing list
win-pv-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/win-pv-devel