Re: [Xen-devel] Just another PCI VGA passthru report

[Pavel MatÄja <pavel@xxxxxxxxxx>]

On Tue 11. of January 2011 18:42:53 Konrad Rzeszutek Wilk wrote:
> On Tue, Jan 11, 2011 at 09:01:47AM +0100, Pavel MatÄja wrote:
> > On Mon 10. of January 2011 15:32:19 you wrote:
> > > > Some problems:
> > > > Disk performance is poor even when I use gplpv drivers.
> > > 
> > > As in, about the same as HVM drivers?
> > 
> > I'll measure some numbers for you today afternoon.
> > 
> > > > I can't read valid CPU frequency from /proc/cpuinfo
> > > 
> > > This is in Dom0 I presume?
> > 
> > Yes, Dom0 reports:
> > cpu MHz         : 306230.313
> 
> Whoa. The timer is way off. Did you specify any specific timer clock
> on the bootup line? Are you using the 4.0.1 or xen-unstable hypervisor?

I'm running xen-unstable.

> > Same kernel running on baremetal (no load):
> > cpu MHz         : 800.000
> > 
> > > > I can't power computer off. It's working normaly when running non XEN
> > > > kernel.
> 
> Hmm, that ought to work - unless you are using an older hypervisor.

Hmm, I'm not. I'll update my tree and rebuild.

> > > Hmm, can you be more specific. Is it working when you boot the
> > > 2.6.32.26-g3147caa as baremetal?
> > 
> > Same kernel booted as baremetal turns power off just fine.
> > Last message from the kernel booted as dom0 is:
> > ACPI: preparing to enter system sleep state S5
> > Disabling non-boot CPUs.
> 
> Hmmmm.. That does work on my boxes, so I am surprised you see this. What
> do you see on the Xen hypervisor serial line if you pass in 'sync_console
> loglvl=all' You should see something from the (XEN): .. about ACPI
> shutdown.

Where should I get serial line?
I have nothing special in my GRUB config.

menuentry 'Debian GNU/Linux, with Linux 2.6.32.26-g3147caa-dirty and XEN 4.1-
unstable' --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 9c94fbb4-64a7-438c-aa7a-35ca818bc312
        echo    'Loading Linux 2.6.32.26-g3147caa-dirty ...'
        multiboot       /xen-4.1-unstable.gz placeholder
        module  /vmlinuz-2.6.32.26-g3147caa-dirty placeholder 
root=/dev/mapper/lemra-old_root ro  panic=15 xen-pciback.hide=(00:14.2) 
        echo    'Loading initial ramdisk ...'
        module  /initrd.img-2.6.32.26-g3147caa-dirty
}

I'll update kernel to the latest git version and retry.
-- 
Pavel Mateja

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