Hi, the initramfs protocol (see [1]) supports multiple concatenated archives.
Because of grub2's implicit unzipping of gz-compressed multiboot modules, a valid initramfs-file (e.g. in my case containing of two concatenated gz-files) may be rendered unbootable. I have attached the trivial patch adding --nounzip to the the appropriate module-directive when generating XEN boot entries. As this resembles the behavior when booting without XEN (using the grub2 commands linux and initrd) more closely I don't expect any problems. I have reported this to the Debian bugtracker before [2] with no response, but I suppose this is the correct point to report this issue. Thank you Lukas [1] https://www.kernel.org/doc/Documentation/early-userspace/buffer-format.txt [2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700197
diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in
index 4cf93d2..f12f059 100644
--- a/util/grub.d/20_linux_xen.in
+++ b/util/grub.d/20_linux_xen.in
@@ -135,7 +135,7 @@ EOF
message="$(gettext_printf "Loading initial ramdisk ...")"
sed "s/^/$submenu_indentation/" << EOF
echo '$(echo "$message" | grub_quote)'
- module ${rel_dirname}/${initrd}
+ module --nounzip ${rel_dirname}/${initrd}
EOF
fi
sed "s/^/$submenu_indentation/" << EOF
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