Hi, Since I upgraded my ubuntu machine to 8.04, /usr/local/bin/qemu-system-x86_64 segfaults when starting with -net tap,ifname=tap0 flags. Of course, it's been recompiled.
$ sudo /usr/local/bin/qemu-system-x86_64 /data/virt/netbsd.img -net nic,macaddr=00:56:01:02:03:04 -net tap,ifname=tap0,script=/etc/qemu-ifup Segmentation fault I see the same behaviour with any NIC, and for kvm from -62 to -67 (I tested each version). Downgrading to kvm-61 fixes the problem. It seems like there's a similar bug report here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=476469 The VM also start correctly with qemu. $ modinfo kvm-intel filename: /lib/modules/2.6.24-16-generic/extra/kvm-intel.ko license: GPL author: Qumranet version: kvm-67 srcversion: 2E2C88C6F09E216FDAA6797 depends: kvm vermagic: 2.6.24-16-generic SMP mod_unload 586 parm: bypass_guest_pf:bool parm: enable_vpid:bool parm: flexpriority_enabled:bool $ uname -a Linux tatooine 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux $ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz stepping : 6 cpu MHz : 1596.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fdiv_bug : no hlt_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 pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3736.56 clflush size : 64 processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz stepping : 6 cpu MHz : 1596.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fdiv_bug : no hlt_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 pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3733.37 clflush size : 64 Interesting packages ii bridge-utils 1.2-2 ii iproute 20071016-2ubuntu1 ii libc6 2.7-10ubuntu3 Hope this helps, regards ---------------------------------------- Emile "iMil" Heitor <[EMAIL PROTECTED]> _ http://gcu-squad.org ASCII ribbon campaign ( ) - against HTML email X & vCards / \ ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel