Re: [Fedora-xen] pciback at boot time
On Mon, Oct 15, 2012 at 9:51 AM, Konrad Rzeszutek Wilk
<konrad.wilk(a)oracle.com> wrote:
On Mon, Oct 15, 2012 at 09:50:31AM -0400, Gordon McLellan wrote:
> On Mon, Oct 15, 2012 at 9:03 AM, Konrad Rzeszutek Wilk
> <konrad.wilk(a)oracle.com> wrote:
> >
> > Huh? Why? This is what I've in my /etc/defalt/grub
> >
> > [root@phenom konrad]# cat /etc/default/grub
> > GRUB_TIMEOUT=5
> > GRUB_DISTRIBUTOR="Xen 4.1"
> > GRUB_DEFAULT=saved
> > GRUB_CMDLINE_LINUX="rd.md=0 rd.lvm=0 rd.dm=0 KEYTABLE=us debug loglevel=8
SYSFONT=latarcyrheb-sun16 rd.luks=0 LANG=en_US.UTF-8 radeon.modeset=0
xen-pciback.hide=(01:00.0)(01:00.1)(02:00.0)"
> > GRUB_CMDLINE_XEN="loglvl=all guest_loglvl=all iommu=verbose"
> >
> > And it works quite well for me and I am using the stock Fedora kernel.
> >
>
> Konrad,
>
> I'm not sure... it is probably something I have done wrong, and
> probably something simple so I am overlooking it. I have gone back to
> stock FC17 kernel and slimmed down my hide list to see if that helps:
Hm, just realized that the machine is running F16, not F17!
> [root@xenhost ~]# cat /etc/default/grub
> GRUB_TIMEOUT=5
> GRUB_DISTRIBUTOR="Fedora"
> GRUB_DEFAULT=saved
> GRUB_CMDLINE_LINUX="rd.md=0 rd.dm=0 SYSFONT=True rd.lvm.lv=vg0/swap
> KEYTABLE=us rd.lvm.lv=vg0/root rd.luks=0 LANG=en_US.UTF-8
> xen-pciback.hide=(0b:00.0)(09:00.0)"
> GRUB_CMDLINE_XEN="dom0_mem=4096M,max:4096M dom0_max_vcpus=2
> dom0_vcpus_pin loglvl=all guest_loglvl=all"
>
> however the xen-pciback module is not loading at boot, and when I try
> to load it manually:
> [root@xenhost ~]# modprobe -vv xen-pciback
> insmod
/lib/modules/3.6.1-1.fc17.x86_64/kernel/drivers/xen/xen-pciback/xen-pciback.ko
> 0)
> libkmod: kmod_module_insert_module: Failed to insert module
>
'/lib/modules/3.6.1-1.fc17.x86_64/kernel/drivers/xen/xen-pciback/xen-pciback.ko':
> No such file or directory
> ERROR: could not insert 'xen_pciback': No such file or directory
That would imply it is simply gone. And does
cat /boot/config-3.6.1-1* | grep BACKEND
tell you whether the Xen PCI backend is compiled in (=y) or is a module (=m)?
>
> It is claiming file not found, but if I run the command on the first
> line (insmod) it claims a different error, it does not like the "0)"
> [root@xenhost ~]# insmod
> /lib/modules/3.6.1-1.fc17.x86_64/kernel/drivers/xen/xen-pciback/xen-pciback.ko
> 0)
> -bash: syntax error near unexpected token `)'
What is the "0)' from?
pciback is compiled as a module:
[root@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@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