Bug#639931: [grub2] "update-grub" adds line to "multiboot" with Xen kernel

[MisterE]

Package: grub-pc
Version: 1.98+20100804-14



Hello guys,

Asked this question before on the Xen mailinglist. They recommended
to file a bug to Debian.


I use Debian Squeeze. I want to passthrough PCI devices.
With the old stable Debian (grub legacy) i did not have problems.

I edit /etc/default/grub like:
    quote:
    GRUB_CMDLINE_XEN_DEFAULT="quiet xen-pciback.permissive xen-pciback.hide=(00:14.2)(01:05.1)"


I run "update-grub". Now i look at /boot/grub/grub.cfg:


    ### BEGIN /etc/grub.d/20_linux_xen ###
    menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN 4.0-amd64' --class debian --class gnu-linux --class gnu --class os --class xen {
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set 5a097ed6-415b-45ff-bba7-d628c92b1f7a
    echo 'Loading Linux 2.6.32-5-xen-amd64 ...'
    multiboot /xen-4.0-amd64.gz placeholder quiet xen-pciback.permissive xen-pciback.hide=(00:14.2)(01:05.1)
    module /vmlinuz-2.6.32-5-xen-amd64 placeholder root=/dev/mapper/vg_dom0-lv_root ro quiet
    echo 'Loading initial ramdisk ...'
    module /initrd.img-2.6.32-5-xen-amd64
    }


The "pciback" command is at the "multiboot" line. This does not work? It does not seize the device after a reboot.

If i use:
    quote:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet xen-pciback.permissive xen-pciback.hide=(00:14.2)(01:05.1)"


The result is:
    ### BEGIN /etc/grub.d/20_linux_xen ###
    menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN 4.0-amd64' --class debian --class gnu-linux --class gnu --class os --class xen {
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set 5a097ed6-415b-45ff-bba7-d628c92b1f7a
    echo 'Loading Linux 2.6.32-5-xen-amd64 ...'
    multiboot /xen-4.0-amd64.gz placeholder
    module /vmlinuz-2.6.32-5-xen-amd64 placeholder root=/dev/mapper/vg_dom0-lv_root ro quiet xen-pciback.permissive xen-pciback.hide=(00:14.2)(01:05.1)
    echo 'Loading initial ramdisk ...'
    module /initrd.img-2.6.32-5-xen-amd64
    }


    root at dom0:/etc# uname -a
    Linux dom0 2.6.32-5-xen-amd64 #1 SMP Tue Jun 14 12:46:30 UTC 2011 x86_64 GNU/Linu


Now the "pciback" command is at the "module" line and the device is actually seized. The problem is that is added to all linux kernels and not only the Xen kernel.

-- 
Best regards,
 MisterE                          mailto:MisterE2002 at zonnet.nl