[Pkg-xen-devel] Bug#657014: Bug#657014: Wheezy, Squeeze and Ubuntu server 11.10 has missing boot option to Xen

[Ian Campbell]

Hi Erik,

Thank you for your bug report.

On Mon, 2012-01-23 at 13:36 +0100, Erik Hjelmås wrote:
> Package: xen-hypervisor-4.1-amd64
> Version: 4.1.2-2
> 
> When installing xen-linux-system on a new Dell R810 server, Wheezy, 
> Squeeze and Ubuntu server 11.10 all boot fine when booted directly into 
> the standard kernel, but when booting through Xen (after installing the 
> package xen-linux-system) the boot process hangs as soon as Xen passes 
> control to the Dom0 kernel:
> 
> "Gave up waiting for root device" etc
> 
> and it gives me Busybox, but it is also frozen, so there's no other 
> option that reboot.

This might be the same issue as #649923. But please could you provide
full console logs so we can verify. If you are able to try the patch in
that bug or perhaps a backported 4.1 hypervisor that would also be
potentially interesting.

> After several days of troubleshooting it turns out that adding dom0_mem 
> option (e.g. dom0_mem=8192M) to the multiboot line of 
> /etc/grub.d/20_linux_xen FIXES THE PROBLEM !
> 
> maybe this has to be fixed in the package?

That file is provided by grub, not the hypervisor but I don't think that
fix will work since a) really it is a workaround not a fix and b) it is
not really possible to determine what is the right number to use for any
given system.

Ian.

> (I havent tried this out on other hardware, only on the Dell R810 with 
> 256GB RAM and four eight-core processors)
> 
> kind regards,
> 
> /Erik
> 
> 
> 
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-- 
Ian Campbell

You are number 6!  Who is number one?