Re: [Xen-devel] pv_ops dom0 kernel failure with ata_piix

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Pasi Kärkkäinen wrote:
> On Tue, Dec 30, 2008 at 08:18:45PM +0200, Pasi Kärkkäinen wrote:
>   
> > On Tue, Dec 30, 2008 at 06:52:11PM +0200, Pasi Kärkkäinen wrote:
> >     
> > > On Tue, Dec 30, 2008 at 11:47:40AM -0500, Todd Deshane wrote:
> > >       
> > > > On Tue, Dec 30, 2008 at 11:28 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > > >         
> > > > > > > Try changing the SATA mode of the disk in the BIOS to either legacy or
> > > > > > > ATA, depending
> > > > > > > on what you bios supports.
> > > > > > >
> > > > > > > There is still a known issue with some of the AHCI stuff.
> > > > > > >
> > > > > > >               
> > > > > > I'm not using AHCI at all.. AHCI (SATA) controller does not have any disks
> > > > > > plugged in.
> > > > > >
> > > > > > My (only) disk is attached to IDE/PATA ICH6 controller..
> > > > > >
> > > > > >             
> > > > > I tried disabling AHCI anyway (even when I'm not using the AHCI SATA
> > > > > controller), but it didn't help.
> > > > >
> > > > > Booting the pv_ops dom0 kernel still fails.. because the IDE/PATA controller
> > > > > still gets disabled (just like in the logs above) for some unknown reason.
> > > > >
> > > > > -- Pasi
> > > > >           
> > > > So from the log it looks like you are getting a hard crash?
> > > >
> > > >         
> > > No, it's not a hard crash.. I'm able to reboot the box with ctrl-alt-del. 
> > >
> > >       
> > > > Did you try adding noreboot to the xen command line and then trying
> > > > to get any more information with sysreq stuff?
> > > >
> > > > Another thing that I noticed in the log is:
> > > >
> > > > irq 12: nobody cared (try booting with the "irqpoll" option)
> > > >
> > > > Is it an smp kernel? I had some weird problems when passing nosmp at
> > > > one point.
> > > >
> > > >         
> > > Yep, it is SMP kernel.. 
> > >  
> > >       
> > > > I don't recognize this crash, those module traces, at least for me were
> > > > non-fatal and didn't cause a crash. I was normally just dropped to a
> > > > initramfs prompt in the case when the disk was not detected properly.
> > > >
> > > > I was then able to at least look around and check that modules were
> > > > loaded correctly etc.
> > > >
> > > >         
> > > The problem seems to be the IDE controller/disk is not detected at all..
> > > because the device gets disabled for some reason during ata_piix
> > > loading/probing.. 
> > >
> > > That is the only disk I have, so the root partition is on it.
> > >
> > > Same kernel works just fine on baremetal without Xen.
> > >
> > >       
> > So I guess the subject should be 'failure with ata_piix' instead of 'crash'.. 
> >
> > Anyway, there seems to be problems with ata_piix too.. in addition to AHCI.
> >
> > Jeremy: Can you think of anything to try? 
> >
> >     
> I tried booting with "nosmp" dom0 kernel parameter:
>   
Yes, nosmp is known to make things worse.  It has the side-effect of 
disabling io_apic support, so all the interrupt stuff fails in the way 
you've noticed.
   J

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