Re: [Xen-devel] debian stretch dom0 + xen 4.9 fails to boot

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: 07 June 2017 09:07
> To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Cc: Paul Durrant <Paul.Durrant@xxxxxxxxxx>; xen-devel (xen-
> devel@xxxxxxxxxxxxxxxxxxxx) <xen-devel@xxxxxxxxxxxxxxxxxxxx>
> Subject: Re: [Xen-devel] debian stretch dom0 + xen 4.9 fails to boot
> 
> >>> On 06.06.17 at 19:00, <boris.ostrovsky@xxxxxxxxxx> wrote:
> > FWIW, one of machines in our test farm choked on this very patch. I
> > don't remember details now but essentially it turned out that syslinux
> > (we are pxe-booting) could not handle changes in ELF sections layout
> > (the way syslinux calculated how to load the binary into memory resulted
> > in overlap of some sort).
> 
> There has always been an overlap between the main and the notes
> segment; there being only two segments I don't see any other
> potential for an overlap. In fact I can't see anything other than size
> differences between a 4.8.1 and a 4.9 binary, plus of course the
> base address change resulting from Daniel's EFI/GrUB2 patches. So
> I'm rather puzzled as to what effect Jürgen's patch could have had
> on the behavior of any loader whatsoever.
> 
> The only possibly misleading section I notice is .reloc, but that's
> present in xen-syms only, not in xen.gz. And again it's a result of
> Daniel's series, not Jürgen's patch.
> 

I guess I could apply the patch in isolation against 4.8 and see if it causes a 
problem. I'll give that a quick try.

  Paul

> Jan
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