Re: [Xen-devel] What is the state of blktap2?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Jan 26, 2010 at 11:32:58AM -0500, David P. Quigley wrote:
> On Tue, 2010-01-26 at 09:10 +0200, Pasi Kärkkäinen wrote:
> > On Mon, Jan 25, 2010 at 06:23:55PM -0500, David P. Quigley wrote:
> > > On Fri, 2010-01-22 at 17:43 -0500, Konrad Rzeszutek Wilk wrote:
> > > > > > Here is a little script that fixes most common problems.
> > > > > > 
> > > > > > grep -q xenfs /etc/fstab || echo "xenfs                   /proc/xen 
> > > > > >               xenfs   defaults        0 0" >> /etc/fstab
> > > > > > if grep -q ata_piix /etc/modprobe.conf ; then
> > > > > >     NR=`cat /etc/modprobe.conf | grep scsi | wc -l`
> > > > > >     grep -q pata_oldpiix /etc/modprobe.conf || echo "alias 
> > > > > > scsi_hostadapter$NR pata_oldpiix" >> /etc/modprobe.conf
> > > > > > fi
> > > > > > grep -q hvc /etc/inittab || echo "co:2345:respawn:/sbin/agetty hvc0 
> > > > > > 9600 vt100-nav" >> /etc/inittab
> > > > > > grep -q hvc0 /etc/securetty || echo "hvc0" >> /etc/securetty
> > > > > > 
> > > > > 
> > > > > 
> > > > > Is this for a domU or a dom0 pvops kernel? I didn't think that the
> > > > 
> > > > Dom0. Thought the sections aobut /etc/inittab and seceretty can be used
> > > > on DomU too.
> > > > > terminal for dom0 would be changed to hvc but I'm new to this so I 
> > > > > could
> > > > 
> > > > It has.
> > > > 
> > > > _______________________________________________
> > > > Xen-devel mailing list
> > > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > > http://lists.xensource.com/xen-devel
> > > 
> > > I've been trying for the better part of today to get this working and I
> > > seem to keep hitting a wall. I finally managed to get the kernel booted
> > > but only with a serial console. I found out that some modules were
> > > missing so that might have caused the lack of console support but now
> > > the kernel won't boot to a prompt at all. I keep running into a null
> > > dereference in the uhci driver. I can try to rebase Jeremy's patches
> > > onto a newer kernel.org version but I'd first like to check to make sure
> > > this isn't already a known problem with a solution.
> > > 
> > 
> > You can try my .config files for pv_ops dom0 kernel, available from here:
> > http://wiki.xensource.com/xenwiki/XenParavirtOps
> > 
> > in the "Troubleshooting" section.. just use "make oldconfig" with them.
> > 
> > -- Pasi
> 
> Thanks for the suggestion. I am already using your config though so its
> not clear to me if its a config issue. Once I got that working and
> booting I keep getting null pointer dereferences in some other code
> thats not xen related. The only reason it might be affected by xen is
> because its complaining about something with the PCI space. The error
> text is below.
> 
> uhci_hcd 0000:00:1a.1: PCI INT B -> GSI 17 (level, low) -> IRQ 17
> uhci_hcd 0000:00:1a.1: UHCI Host Controller
> uhci_hcd 0000:00:1a.1: new USB bus registered, assigned bus number 3
> uhci_hcd 0000:00:1a.1: irq 17, io base 0x0000ff00
> uhci_hcd 0000:00:1a.1: host system error, PCI problems?
> uhci_hcd 0000:00:1a.1: host controller halted, very bad!
> uhci_hcd 0000:00:1a.1: HC died; cleaning up
> 

Uh oh :) That looks bad.. I haven't seen that on my testboxes.. 
so dunno really what would help.

Is Xen complaining something when that happens? Check "xm dmesg".

Do you have "loglvl=all guest_loglvl=all" options for xen.gz in grub.conf? 

-- Pasi


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