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Description of problem: this bug only was found in both of the following hosts. intel-5550 and intel-x7550. No all hosts can reproduce this bug. (gdb) bt #0 tb_alloc_page (tb=0x2aababee4010, phys_pc=4311875568, phys_page2=18446744073709551615) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/exec.c:1131 #1 tb_link_phys (tb=0x2aababee4010, phys_pc=4311875568, phys_page2=18446744073709551615) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/exec.c:1221 #2 0x00000000004a274e in tb_gen_code (env=0xe5be90, pc=18446697165508169712, cs_base=4294901760, flags=68, cflags=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/exec.c:917 #3 0x00000000004a55e3 in tb_find_fast (env1=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/cpu-exec.c:165 #4 cpu_x86_exec (env1=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/cpu-exec.c:582 #5 0x000000000040e519 in main_loop (argc=26, argv=0x7fffffffe718, envp=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:4188 #6 main (argc=26, argv=0x7fffffffe718, envp=<value optimized out>) at /usr/src/debug/kvm-83-maint-snapshot-20090205/qemu/vl.c:6559 Version-Release number of selected component (if applicable): [root@intel-x7550-512-1 ~]#rpm -qa|grep kvm kvm-83-232.el5 [root@intel-x7550-512-1 ~]# uname -r 2.6.18-262.el5 How reproducible: Steps to Reproduce: 1./usr/libexec/qemu-kvm -M rhel5.6.0 -no-kvm -startdate now -name rhel4.9 -smp 2 -m 4G -uuid `uuidgen` -boot c -drive file=/root/testrun/rhel49.qcow2,media=disk,if=virtio,cache=none,boot=on,format=qcow2,werror=stop -notify all -balloon none -net none -monitor stdio 2. 3. Actual results: (qemu) Segmentation fault Expected results: guest start successful Additional info:
The -no-kvm option isn't supported.