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Re: [PATCH] remove dependency on /boot/config-* in grub.d/20_linux_xen

From: Konrad Rzeszutek Wilk
Subject: Re: [PATCH] remove dependency on /boot/config-* in grub.d/20_linux_xen
Date: Wed, 13 Nov 2013 08:56:50 -0500
User-agent: Mutt/1.5.21 (2010-09-15)

On Sun, Nov 10, 2013 at 09:40:29PM +0100, Vladimir 'φ-coder/phcoder' Serbinenko 
> On 15.07.2013 20:00, Konrad Rzeszutek Wilk wrote:
> > Hey,
> > 
> > There is a discussion on the linux-kernel mailing list in which the
> > Linus states that "if you depend on any config file, you're broken
> > by definition" (
> > 
> Please try my grub_file branch:
> It should do what you want.

Oddly I get this after I installed it.

/sbin/grub-probe: error: failed to get canonical path of `'.

And I kind of fixed it by removing the 'set -e' at the start
of the file.

After that, and with me removing the /boot/config-3.12.0 file
it generates an proper entry in grub.cfg for the Xen payload!

The other thing I saw was that the 'root' option for Linux
ended up being 'root=' instead of the 'root=UUID=blabla'.

See here:

if [ x"$grub_platform" != xxen \(  x"$grub_cpu" = xi386 -o x"$grub_cpu" = 
xx86_64 -o x"$grub_platform" = x \) ]; then
menuentry 'Fedora GNU/Linux, with Xen hypervisor' --class fedora --class 
gnu-linux --class gnu --class os --class xen $menuentry_id_option 
'xen-gnulinux-simple-' {
        insmod part_msdos 
        insmod ext2
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  
          search --no-floppy --fs-uuid --set=root 
        echo    'Loading Xen xen ...'
        if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then
            xen_rm_opts="no-real-mode edd=off"
        multiboot       /xen.gz placeholder guest_loglvl=all com1=115200,8n1 
console=com1,vga loglvl=all 
iommu=no-amd-iommu-perdev-intremap,verbose,debug,no-intremap  ${xen_rm_opts}
        echo    'Loading Linux 3.12.0 ...'
        module  /vmlinuz-3.12.0 placeholder root= ro rd.lvm=0 
rd.luks=0  loglevel=8 radeon.modeset=0 xen-pciback.hide=(05:00.*) console=hvc0 
        echo    'Loading initial ramdisk ...'
        module  /initramfs-3.12.0.img

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