[Fedora-xen] pciback at boot time

[M A Young]

On Mon, 15 Oct 2012, Gordon McLellan wrote:

> pciback is compiled as a module:
> [root at xenhost ~]# grep BACKEND /boot/config-3.6.1-1.fc17.x86_64
> CONFIG_XEN_BLKDEV_BACKEND=m
> CONFIG_XEN_NETDEV_BACKEND=m
> CONFIG_XEN_BACKEND=y
> CONFIG_XEN_PCIDEV_BACKEND=m
>
> and the file does exist:
> [root at xenhost ~]# ls -lah
> /lib/modules/3.6.1-1.fc17.x86_64/kernel/drivers/xen/xen-pciback/
> total 108K
> drwxr-xr-x 2 root root 4.0K Oct 12 10:19 .
> drwxr-xr-x 4 root root 4.0K Oct 12 10:19 ..
> -rwxr--r-- 1 root root 100K Oct 10 08:41 xen-pciback.ko
>
> Near as I can tell the 0) is coming from the kernel command line but
> it is getting mangled somewhere along the way.  If I remove the
> xen-pciback.hide directive from the grub config file, the kernel is
> able to load the pciback module without issue, and without any
> configuration.  I tried moving the xen-pciback.hide directive to the
> front of the kernel command line, it did not help.
>
> From dmesg:
> [    0.000000] Initializing cgroup subsys cpuset
> [    0.000000] Initializing cgroup subsys cpu
> [    0.000000] Linux version 3.6.1-1.fc17.x86_64 (mockbuild@) (gcc
> version 4.7.2 20120921 (Red Hat 4.7.2-2) (GCC) ) #1 SMP Wed Oct 10
> 12:13:05 UTC 2012
> [    0.000000] Command line: placeholder root=/dev/mapper/vg0-root ro
> xen-pciback.hide=(0b:00.0)(09:00.0) rd.md=0 rd.dm=0 rd.lvm.lv=vg0/swap
> KEYTABLE=us rd.lvm.lv=vg0/root rd.luks=0 LANG=en_US.UTF-8

If you haven't already done so I suggest you get rid of anything in 
/etc/modprobe.d/ you added, just in case that is getting in the way.

 	Michael Young