On 02.01.2010, at 14:48, Alexander Graf wrote: > > On 02.01.2010, at 14:45, Daniel Bareiro wrote: > >> Hi, Alexander. >> >> On Saturday, 02 January 2010 14:11:04 +0100, >> Alexander Graf wrote: >> >>>>> In this guest I'm using Linux 2.6.32, with userspace kvm-85 of >>>>> backports. For the VM booted within of 'test', I am using a qcow2 >>>>> file. But when connecting via VNC, the boot process is hung in >>>>> "Press for F12 boot menu". Sometimes it gets to pass this instance >>>>> and I see the Debian install menu, but while I cross the options, >>>>> it is hung. >> >>>> Also I was trying to use qemu-kvm-0.12.1.1 with to Linux 2.6.32 in >>>> guest within 'test'. And here it happens something similar. >>>> Sometimes I get to select the option of the menu of the installer, >>>> but after boot, the installation is hung again. >> >>> Can your host do nested paging? Shadow shadow paging can be a bit >>> flaky at times :-(. >> >> Hmmm... is there some way to verify that? >> >> The CPUs model is AMD Athlon 64 X2 Dual Core 3800+. Perhaps some flag >> related? In such case, these are the available ones in the host: >> >> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge >> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext >> fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm cmp_legacy >> svm extapic cr8_legacy >> >> >> When loading the module with "kvm_amd nested=1", /var/log/messages >> registers the following thing: >> >> kvm: Nested Virtualization enabled > > With nested paging it would show something like this in dmesg: > > kvm: Nested Paging enabled > > All family 10 AMD CPUs have nested paging (read: quad-core and above). > > > So I guess you found something going wrong with shadow-shadow paging. CC'ing Jörg. He's more into memory management than me :-). Eh - CC'ing :-). Alex-- 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
