I seem to be having the same problem as Aurelien Jarno, but with different results.
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/4601/focus=4614 I have a Windows XP guest on the Ubuntu Feisty 64 kernel 2.6.20-16-generic (not using the distro modules, but the ones from 29 or 31). Kvm-28 works fine, no problems. On KVM-29 or 31, what happens is the XP guest shows the smaller window with the blue progress bar while it is booting. As soon as the screen resizes and that boot splash disappears, the whole computer reboots (host, guest, everything is gone). About a half second after the qemu window resizes, the screen goes blank and I am looking at the BIOS for my host computer. No chance to see an oops or anything, hard reset... syslog looks like Jul 19 15:14:12 zeus kernel: [278104.910849] kvm: emulating exchange as write Jul 19 15:15:55 zeus syslogd 1.4.1#20ubuntu4: restart. Jul 19 15:15:55 zeus kernel: Inspecting /boot/System.map-2.6.20-16-generic Jul 19 15:15:56 zeus kernel: Loaded 25651 symbols from /boot/System.map-2.6.20-16-generic. Jul 19 15:15:56 zeus kernel: Symbols match kernel version 2.6.20. ... So, I reverted commit ba9c20c048726037664d303362b688759fdf6e9d on top of 29, and it works fine. I also reverted the patch on top of 31 (first hunk failed, but it is just adding the int no_wb variable...) and it also works fine. After reverting the commit, both 29 and 31 both work fine... no crash. Also, the patch you supplied in that thread does not work...tried the patch on 29 and 31... same symptom... immediate reboot. John $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 75 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping : 2 cpu MHz : 1000.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes 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 pni cx16 lahf_lm cmp_legacy svm cr8_legacy bogomips : 2010.95 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 75 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping : 2 cpu MHz : 1000.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes 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 pni cx16 lahf_lm cmp_legacy svm cr8_legacy bogomips : 2010.95 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
