(gdb) run Starting program: /usr/bin/kvm -M pc-0.12 -enable-kvm -m 256 -smp 1 -boot d -drive file=/mnt/megadiff/cdiso_400_130.iso,if=ide,media=cdrom,index=2 -drive file=/home/mmarkk/spamsender2.img,if=scsi,index=0,format=qcow2,cache=writeback [Thread debugging using libthread_db enabled] [New Thread 0xb7145b70 (LWP 4715)] pci_add_option_rom: failed to find romfile "pxe-rtl8139.bin" [New Thread 0xa54c4b70 (LWP 4747)] scsi-disk: Tag 0x0 already in use
Program received signal SIGSEGV, Segmentation fault. 0x08468b10 in ?? () (gdb) bt #0 0x08468b10 in ?? () #1 0x080f0ef6 in ?? () #2 0x080d4cf9 in ?? () #3 0x080c470f in ?? () #4 0x080c47c7 in ?? () #5 0x08052266 in ?? () #6 0x0806dcc4 in ?? () #7 0x08055465 in ?? () #8 0xb7a42bd6 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #9 0x0804ec51 in ?? () (gdb) mma...@mmarkk-work:~/src/KVM$ pmap 4712 4712: /usr/bin/kvm -M pc-0.12 -enable-kvm -m 256 -smp 1 -boot d -drive file=/mnt/megadiff/cdiso_400_130.iso,if=ide,media=cdrom,index=2 -drive file=/home/mmarkk/spamsender2.img,if=scsi,index=0,format=qcow2,cache=writeback 08048000 2064K r-x-- /usr/bin/qemu-system-x86_64 0824c000 4K r---- /usr/bin/qemu-system-x86_64 0824d000 76K rw--- /usr/bin/qemu-system-x86_64 08260000 3408K rw--- [ anon ] 085b4000 64K rw--- [ anon ] It seems, that 0x0804ec51 is in anonymous memory, does not it ? I will try to use debug libraries. Please write how I can help more. -- KVM segmentation fault, using SCSI+writeback and linux 2.4 guest https://bugs.launchpad.net/bugs/595438 You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. Status in QEMU: New Bug description: I Use Ubuntu 32 bit 10.04 with standard KVM. I have Intel E7600 @ 3.06GHz processor with VMX In this system I Run: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -M pc-0.12 -enable-kvm -m 256 -smp 1 -name spamsender -uuid b9cacd5e-08f7-41fd-78c8-89cec59af881 -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/spamsender.monitor,server,nowait -monitor chardev:monitor -boot d -drive file=/mnt/megadiff/cdiso_400_130.iso,if=ide,media=cdrom,index=2 -drive file=/home/mmarkk/spamsender2.img,if=scsi,index=0,format=qcow2,cache=writeback -net nic,macaddr=00:00:00:00:00:00,vlan=0,name=nic.0 -net tap,vlan=0,name=tap.0 -chardev pty,id=serial0 -serial chardev:serial0 -parallel none -usb -vnc 127.0.0.1:0 -vga cirrus .iso image contain custom distro of 2.4-linux kernel based system. During install process (when .tar.gz actively unpacked), kvm dead with segmentation fault. And ONLY when I choose scsi virtual disk and writeback simultaneously. But, writeback+ide, writethrough+scsi works OK. I use qcow2. It seems, that qcow does not have such problems. Virtual machine get down at random time during file copy. It seems, when qcow2 file size need to be expanded.