Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> writes: > On Sat, Jun 14, 2014 at 09:07:51AM +0200, lee wrote: >>> Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> writes: >> > >> > I am wondering if you are using an older kernel. The xen-acpi-processor >> > driver should be loaded which would give the C and P states to the >> > hypervisor. Which in turn would result in those above commands >> > providing the right data. >> >> Linux heimdall 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u2 x86_64 GNU/Linux >> >> This is what comes in Debian. Unfortunately, this kernel crashes when >> I'm copying data to a domU NFS server over the network :(( I need to >> find out how to get some useful information out of it to make a bug >> report. >> >> How do I know whether the xen-acpi-processor driver is loaded or not? > > lsmod Well, yes, I didn't know what the name of this module exactly is. There's also the "processor" module. > But it looks like v3.4 and later were the kernels that started having > this driver. That would explain why it does not exist as you are using > 3.2. Because of the crashes, I've upgraded to a 3.14.5-1~bpo70+1 kernel from Debian backports. That one does have the "xen-acpi-processor" module, and it's working. I don't know yet if it'll crash, though. -- Knowledge is volatile and fluid. Software is power.