Re: [Xen-devel] kernel BUG at drivers/xen/balloon.c:528!

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 20 Jul 2010, Łukasz Oleś wrote:
> > diff --git a/arch/x86/xen/platform-pci-unplug.c 
> > b/arch/x86/xen/platform-pci-unplug.c
> > index 2f7f3fb..4513202 100644
> > --- a/arch/x86/xen/platform-pci-unplug.c
> > +++ b/arch/x86/xen/platform-pci-unplug.c
> > @@ -98,8 +98,10 @@ void __init xen_unplug_emulated_devices(void)
> >                }
> >        }
> >        /* Now unplug the emulated devices */
> > -       if (!(xen_emul_unplug & XEN_UNPLUG_IGNORE))
> > +       if (!(xen_emul_unplug & XEN_UNPLUG_IGNORE)) {
> >                outw(xen_emul_unplug, XEN_IOPORT_UNPLUG);
> > +               printk("DEBUG unplug %x\n", xen_emul_unplug);
> > +       }
> >        xen_platform_pci_unplug = xen_emul_unplug;
> >  }
> >
> 
> dmesg output from busybox and qemu log are in attachment
> 
 
As you can see from the logs xen_emul_unplug was 0 and that shouldn't
cause any unplug at all in qemu.
I see that you have a complicated set of kernel command line options,
what guest are you using? Is there a simple way for me to reproduce
your problem?
I tried to remove the platform pci driver from my kernel's config but I
am still able to mount the emulated disk without any issues.

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