Re: [Xen-users] Xen Continuously Reboots

["russo@xxxxxxxxxxxxxxxxxxx" <russo@xxxxxxxxxxxxxxxxxxx>]

You maybe allocating too much memory to your guests.

On 06/06/2016 12:49 AM, Daniel Widenfalk wrote:
> On 2016-06-06 03:22, Ray wrote:
> > Re: [Xen-users] Xen Continuously Reboots
> >
> >
> >  To: xen-users@xxxxxxxxxxxxx
> > From: Daniel Widenfalk <Daniel@xxxxxxxxxxxx>
> > Date: Sun, 5 Jun 2016 22:52:36 +0200
> > Delivery-date: Sun, 05 Jun 2016 20:53:33 +0000
> > List-id: Xen user discussion <xen-users.lists.xen.org>
> >
> > > >  On 2016-06-05 20:11, Ray wrote:
> > > > When I boot to Xen, the machine reboots over and over. This is a 
> > > > laptop
> > > > with stretch and Xen.
> > > > <snipped>
> >
> > > > Ray
> > > * Are you using EFI or legacy boot?
> > > * How far do you get? Do you get the quick "Loading XEN..." thing at 
> > > the
> > > start? Do you start seeing the xen pre-boot phase?
> > > /Daniel W.
> > ______________________________
> >
> >
> > Daniel,
> >
> >
> > Thank you:
> >
> >
> > This is an EFI boot.
> >
> >
> > Once at the boot menu and the 5 seconds lapsed, the system went blank 
> > and started booting.
> > Ray
> Hi,
>
> I've found that both Jessie and Stretch seem to have an error in their
> grub code for xen. The grub code does not recognize "efi" as a valid
> grub platform and therefore applies no-real-mode and eff=off to xen.
> "no-real-mode" means you will not get a VGA console and edd=off means
> xen will not fetch "Extended Disc Data" (whatever that means) from the
> bios.
>
> On my new system I had to edit /etc/grub/20_linux_xen (line 126) and
> add "efi" as a recognized boot platform:
>
> ---- Lines 125 - 30:
>   echo    '$(echo "$xmessage" | grub_quote)'
>   if [ "\$grub_platform" = "pc" -o "\$grub_platform" = "efi" -o 
> "\$grub_platform" = "" ]; then
>     xen_rm_opts=
>   else
>     xen_rm_opts="no-real-mode edd=off"
>   fi
> ----
>
> After making this change I got a working xen/linux vga console and could
> see what was going on. I hope this helps :)
>
> Best regards
> /Daniel Widenfalk
>
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