Bug#727736: Latest linux-image-686-pae fail to boot a xen domU

[Regid Ichira <regid23@nt1.in>]

On Sat, Oct 26, 2013 at 05:40:36AM +0100, Ben Hutchings wrote:
> On Sat, 2013-10-26 at 06:27 +0200, Bastian Blank wrote:
> > On Sat, Oct 26, 2013 at 05:18:56AM +0100, Ben Hutchings wrote:
> > > I think this is just like missing hardware support, which we consider an
> > > important bug.  And it's also a regression in support.
> > 
> > There is no hardware involved.
> 
> If some relatively unchangeable VM environment can only boot
> gzip-compressed kernels then using xz compression means we don't support
> that 'hardware'.
> 
> > > I don't know whether it is important enough to justify using less
> > > efficient compression, but AWS is a very popular platform.
> > 
> > AWS even provides pre-built PV-GRUB with support for XZ[1], so apart
> > from a menu.lst nothing else is needed.
> 
> OK, so maybe we should provide a NEWS entry or other documentation that
> this is now required.
> 


  http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/UserProvidedKernels.html
was mentioned above by Bastian Blank.  At 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=727736#20.  That
document states, in the section `Limitations of PV-GRUB', that 

    * PV-GRUB can boot kernels compressed using the gzip, bzip2,
      lzo, and xz compression formats.

It also states that one of the reasonss of their choice of PV-GRUB is
that it 

    understands standard grub.conf or menu.lst commands, which allows
    it to work with all currently supported Linux distributions.

  I still think there is a problem with newer Debian's kernels and xen's
PV domU.  I'll try to obtain access to an aws vps to boot such a kernel
and get the boot log.  Like I wrote, such a kernel failed with another
xen commercial provider.