Re: [Xen-devel] Linux 3.4 dom0 kernel error loading xen-acpi-processor: Input/output error

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Feb 21, 2013 at 02:42:52PM +0200, Pasi Kärkkäinen wrote:
> On Thu, Feb 21, 2013 at 07:29:13AM -0500, Konrad Rzeszutek Wilk wrote:
> > On Thu, Feb 21, 2013 at 11:24:34AM +0200, Pasi Kärkkäinen wrote:
> > > Hello,
> > > 
> > > Does anyone know why loading xen-acpi-processor driver fails like this?:
> > > 
> > > # modprobe xen-acpi-processor
> > > FATAL: Error inserting xen_acpi_processor 
> > > (/lib/modules/3.4.32-6.el6.centos.alt.x86_64/kernel/drivers/xen/xen-acpi-processor.ko):
> > >  Input/output error
> > > 
> > > Using "modprobe -v" doesn't provide any more information about the 
> > > problem.
> > > Also there's nothing in dom0 kernel dmesg.
> > > 
> > > Hardware is Dell R510 server with Intel Xeon 5600 series CPU. 
> > > Xen 4.2.1.
> > > 
> > > Kernel is based on 3.4.32 (so the upstream kernel.org longterm stable 
> > > version) 
> > > with some additional Xen patches backported from later upstream kernels. 
> > > Any tips how to troubleshoot this? 
> > 
> > Rebuild the module and add this
> > diff --git a/drivers/xen/xen-acpi-processor.c 
> > b/drivers/xen/xen-acpi-processor.c
> > index 316df65..5d824a2 100644
> > --- a/drivers/xen/xen-acpi-processor.c
> > +++ b/drivers/xen/xen-acpi-processor.c
> > @@ -16,6 +16,7 @@
> >   * more details.
> >   *
> >   */
> > +#define DEBUG 1
> >  
> >  #include <linux/cpumask.h>
> >  #include <linux/cpufreq.h>
> > 
> > 
> > That should help in figuring it out.
> > 
> 
> Ok, I'll do that.
> 
> Thanks!

The other thing is that I've been running with this compiled as '=y' instead
of '=m'!

That should temporarily fix it for you, but this does need to be fixed.

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