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 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.

> 
> -- Pasi
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel