Hi, Alex. On Saturday, 02 January 2010 14:48:26 +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 Hmmm... dmesg shows just like /var/log/messages: kvm: Nested Virtualization enabled "Nested Paging enabled" would have to be a complementary message? > All family 10 AMD CPUs have nested paging (read: quad-core and above). But this model is dual-Core :-(. That would mean that it cannot do nested paging? > So I guess you found something going wrong with shadow-shadow paging. > CC'ing Jörg. He's more into memory management than me :-). We hope then that Jörg can illuminate a little more to us :-). Thanks for your reply. Regards, Daniel -- Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Lenny - Linux user #188.598
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