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After looking again at this, I'm not sure we have any idea what caused it. It may be a different issue, but it's not clear if this is 628875, which requires SMP AMD VMs.
(In reply to comment #3)
> After looking again at this, I'm not sure we have any idea what caused it. It
> may be a different issue, but it's not clear if this is 628875, which requires
> SMP AMD VMs.Comment #0 talks about SMP AMD VM. I do not see how it is not duplicate of 628875. I am marking it as duplicate again. Please re-open it if and only if BZ 628875 is resolved but this bug is still reproducible.
*** This bug has been marked as a duplicate of bug 628875 ***
Created attachment 461230 [details] guest hang Description of problem: Version-Release number of selected component (if applicable): qemu-kvm-0.12.1.2-2.119.el6.x86_64 How reproducible: sometime Steps to Reproduce: 1. /usr/Auto/autotest/client/tests/kvm/qemu \ -drive file='/usr/Auto/autotest/client/tests/kvm/images/RHEL-Server-5.5-32.qcow2',index=0,if=none,id=drive-ide0-0-0,media=disk,cache=none,format=qcow2,aio=native \ -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ -device e1000,mac=9a:63:1b:a8:96:d7,netdev=idqvX6p6,id=ndev00idqvX6p6,bus=pci.0,addr=0x3 -netdev tap,id=idqvX6p6,ifname='t0-132851-sBI7',script='/usr/Auto/autotest/client/tests/kvm/scripts/qemu-ifup-vbr0',downscript='no' -m 2048 -smp 2,cores=1,threads=1,sockets=2 \ -drive file='/usr/Auto/autotest/client/tests/kvm/isos/linux/RHEL-Server-5.5-i386-DVD.iso',index=2,if=none,id=drive-ide0-0-1,media=cdrom,readonly=on,format=raw \ -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 \ -drive file='/usr/Auto/autotest/client/tests/kvm/isos/../images/rhel5-32/ks.iso',index=1,if=none,id=drive-ide0-1-0,media=cdrom,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -cpu cpu64-rhel6,+sse2,+x2apic -spice port=8000,disable-ticketing -vga qxl -rtc base=utc,clock=host,driftfix=none -M rhel6.0.0 -usbdevice tablet -no-kvm-pit-reinjection -boot n -enable-kvm 2. 3. Actual results: Expected results: Additional info: 1. top 1475 root 20 0 2607m 1.9g 3280 R 98.9 53.4 43:40.51 qemu 1444 root 20 0 2607m 1.9g 3280 R 11.3 53.4 5:25.54 qemu 1474 root 20 0 2607m 1.9g 3280 S 1.0 53.4 3:43.87 qemu 2. kvm_stat kvm statistics efer_reload 0 0 exits 33676948 5167 fpu_reload 41466 0 halt_exits 3271505 1003 halt_wakeup 339914 0 host_state_reload 9798925 2028 hypercalls 0 0 insn_emulation 15566539 1002 insn_emulation_fail 0 0 invlpg 5047718 0 io_exits 5703887 0 irq_exits 7467664 3163 irq_injections 3997522 1002 irq_window 0 0 largepages 380 0 mmio_exits 184499 0 mmu_cache_miss 140263 0 mmu_flooded 21080 0 mmu_pde_zapped 153954 0 mmu_pte_updated 551211 0 mmu_pte_write 657012 0 mmu_recycled 0 0 mmu_shadow_zapped 142978 0 mmu_unsync 1229 0 nmi_injections 0 0 nmi_window 0 0 pf_fixed 4615757 0 pf_guest 696167 0 remote_tlb_flush 497718 0 request_irq 0 0 signal_exits 1 0 tlb_flush 5827950 0 2. host info processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 107 model name : AMD Athlon(tm) Dual Core Processor 4450B stepping : 2 cpu MHz : 2300.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch lbrv