On 29.07.2013 11:16, Gleb Natapov wrote: > On Mon, Jul 29, 2013 at 11:09:51AM +0200, Stefan Pietsch wrote: >> On 26.07.2013 20:39, Gleb Natapov wrote: >>> On Fri, Jul 26, 2013 at 08:25:19PM +0200, Stefan Pietsch wrote: >>>> Hi all, >>>> >>>> starting a virtual machine (Debian sid) with KVM on my host running >>>> kernel 3.10.1 (Debian 3.10-1-686-pae) produces these messages: >>>> >>> Are those messages printed by a host or a guest? >> >> The host shows the messages. >> >>>> [ 765.522920] Uhhuh. NMI received for unknown reason 31 on CPU 0. >>>> [ 765.522927] Do you have a strange power saving mode enabled? >>>> [ 765.522930] Dazed and confused, but trying to continue >>>> [ 770.487732] Uhhuh. NMI received for unknown reason 21 on CPU 0. >>>> [ 770.487740] Do you have a strange power saving mode enabled? >>>> [ 770.487742] Dazed and confused, but trying to continue >>>> [ 846.340966] Uhhuh. NMI received for unknown reason 31 on CPU 1. >>>> [ 846.340973] Do you have a strange power saving mode enabled? >>>> [ 846.340976] Dazed and confused, but trying to continue >>>> [ 847.563023] Uhhuh. NMI received for unknown reason 31 on CPU 0. >>>> [ 847.563029] Do you have a strange power saving mode enabled? >>>> [ 847.563032] Dazed and confused, but trying to continue >> >> Is it safe to ignore them? >> > They should not happen. What is the last kernel version you tried that > does not produce them? Can you verify that they do not happen without > guest running? What is the qemu command line you are using to start the > guest and what "cat /proc/cpuinfo" looks like in the guest? The Debian wheezy kernel (3.2.46) does not show this behaviour. It is directly related to KVM and I found out that replacing the option "-cpu coreduo" with "-cpu kvm32" does not generate the NMI messages. "coreduo" /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 14 model name : Genuine Intel(R) CPU T2600 @ 2.16GHz stepping : 8 microcode : 0x1 cpu MHz : 1662.559 cache size : 4096 KB fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush mmx fxsr sse sse2 ss nx constant_tsc arch_perfmon pni hypervisor bogomips : 3325.11 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 0 bits virtual power management: "kvm32" /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Common 32-bit KVM processor stepping : 1 microcode : 0x1 cpu MHz : 1662.559 cache size : 4096 KB fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush mmx fxsr sse sse2 constant_tsc pni hypervisor bogomips : 3325.11 clflush size : 64 cache_alignment : 128 address sizes : 32 bits physical, 0 bits virtual power management: -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
