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> Date: Tue, 7 Jun 2016 13:48:12 -0700
> From: "russo@xxxxxxxxxxxxxxxxxxx" <russo@xxxxxxxxxxxxxxxxxxx>
> To: xen-users@xxxxxxxxxxxxx
> Subject: Re: [Xen-users] Xen Continuously Reboots
> Message-ID: <5757330C.4050501@xxxxxxxxxxxxxxxxxxx>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> You maybe allocating too much memory to your guests.
Russo,
Thank you. I can really use the help as I have not been able to get a VM running yet.
The machine has 16 GB of RAM. I had included a line to limit the guest RAM to 2GB. Xen would still not boot. Then I removed the limits and still Xen would not boot.
Would a VM with a high RAM demand stop Xen from booting? I thought a VM would not run until after Xen us up. I could delete the VM configuration and try to boot to Xen, then there would be no VM demand on memory.
Ray
>
> 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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