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Description: In the RHEL6.0 host, the process of install RHEL 5.5 guest will hang while installing packages. This will happen both in single vcpu or multi vcpu. Version-Release number of selected component (if applicable): host kernel: 2.6.32-50.el6.x86_64 guest kernel: 2.6.18-194.el5.x86_64 # rpm -qa |grep qemu qemu-kvm-tools-0.12.1.2-2.96.el6.x86_64 qemu-kvm-0.12.1.2-2.96.el6.x86_64 qemu-kvm-debuginfo-0.12.1.2-2.96.el6.x86_64 gpxe-roms-qemu-0.9.7-6.3.el6.noarch qemu-img-0.12.1.2-2.96.el6.x86_64 How reproducible: 1 out of 3 Steps to Reproduce: 1. Create image by qemu-img # qemu-img create -f qcow2 /root/autotest/client/tests/kvm/images/RHEL-Server-5.5-64-virtio.qcow2 15G 2. Install guest with CDROM using following cmd: # /root/autotest/client/tests/kvm/qemu -name vm1 -monitor unix:/tmp/monitor-humanmonitor1-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/isos/linux/RHEL-Server-5.5-x86_64-DVD.iso,if=none,id=drive-ide0-0-0,media=cdrom,readonly=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -serial unix:/tmp/serial-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/images/RHEL-Server-5.5-64-virtio.qcow2,if=none,id=drive-ide0-0-1,media=disk,cache=none,format=qcow2 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -net nic,vlan=0,netdev=idI7cw7z,model=virtio,macaddr=02:30:0D:20:44:49 -netdev user,id=idI7cw7z,tftp=/root/autotest/client/tests/kvm/images/tftpboot,hostfwd=tcp::5000-:22,hostfwd=tcp::5001-:12323 -m 4096 -smp 1 -fda /root/autotest/client/tests/kvm/images/floppy.img -vnc :0 -spice port=8000,disable-ticketing -vga qxl -rtc base=utc,clock=host -M rhel6.0.0 -usbdevice tablet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -bootp /pxelinux.0 -boot n 3. Wait until the system hang. Trace kvm with debugfs and get kvm statues from command "kvm_stat" Actual results: The process of RHEL 5.5 install will hang. Expected results: Can complete the process of installation for RHEL 5.5 Additional info: 1. The command line: # /root/autotest/client/tests/kvm/qemu -name vm1 -monitor unix:/tmp/monitor-humanmonitor1-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/isos/linux/RHEL-Server-5.5-x86_64-DVD.iso,if=none,id=drive-ide0-0-0,media=cdrom,readonly=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -serial unix:/tmp/serial-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/images/RHEL-Server-5.5-64-virtio.qcow2,if=none,id=drive-ide0-0-1,media=disk,cache=none,format=qcow2 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -net nic,vlan=0,netdev=idI7cw7z,model=virtio,macaddr=02:30:0D:20:44:49 -netdev user,id=idI7cw7z,tftp=/root/autotest/client/tests/kvm/images/tftpboot,hostfwd=tcp::5000-:22,hostfwd=tcp::5001-:12323 -m 4096 -smp 1 -fda /root/autotest/client/tests/kvm/images/floppy.img -vnc :0 -spice port=8000,disable-ticketing -vga qxl -rtc base=utc,clock=host -M rhel6.0.0 -usbdevice tablet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -bootp /pxelinux.0 -boot n 2.Host cpuinfo processor : 2 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 8750 Triple-Core Processor stepping : 3 cpu MHz : 1200.000 cache size : 512 KB physical id : 0 siblings : 3 core id : 2 cpu cores : 3 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 5 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 pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs npt lbrv svm_lock bogomips : 4809.88 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate 3. KVM status info: 3.1 # kvm_stat -1 efer_reload 0 0 exits 9545062 0 fpu_reload 1300856 0 halt_exits 349203 0 halt_wakeup 175518 0 host_state_reload 1302177 0 hypercalls 0 0 insn_emulation 900623 0 insn_emulation_fail 0 0 invlpg 0 0 io_exits 7918007 0 irq_exits 338852 0 irq_injections 559124 0 irq_window 0 0 largepages 1554 0 mmio_exits 137200 0 mmu_cache_miss 165 0 mmu_flooded 0 0 mmu_pde_zapped 0 0 mmu_pte_updated 0 0 mmu_pte_write 76960 0 mmu_recycled 0 0 mmu_shadow_zapped 130 0 mmu_unsync 0 0 nmi_injections 0 0 nmi_window 0 0 pf_fixed 2494 0 pf_guest 0 0 remote_tlb_flush 3 0 request_irq 0 0 signal_exits 4 0 tlb_flush 0 0 3.2 debugfs info: # ps -aux root 18159 10.4 30.3 4602788 1169484 pts/4 Sl+ 16:17 2:14 /root/autotest/client/tests/kvm/qemu -name vm1 -monitor unix:/tmp/monitor-humanmonitor1-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/isos/linux/RHEL-Server-5.5-x86_64-DVD.iso,if=none,id=drive-ide0-0-0,media=cdrom,readonly=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -serial unix:/tmp/serial-20100720-150956-huBw,server,nowait -drive file=/root/autotest/client/tests/kvm/images/RHEL-Server-5.5-64-virtio.qcow2,if=none,id=drive-ide0-0-1,media=disk,cache=none,format=qcow2 -device ide-drive,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -net nic,vlan=0,netdev=idI7cw7z,model=virtio,macaddr=02:30:0D:20:44:49 -netdev user,id=idI7cw7z,tftp=/root/autotest/client/tests/kvm/images/tftpboot,hostfwd=tcp::5000-:22,hostfwd=tcp::5001-:12323 -m 4096 -smp 1 -fda /root/autotest/client/tests/kvm/images/floppy.img -vnc :0 -spice port=8000,disable-ticketing -vga qxl -rtc base=utc,clock=host -M rhel6.0.0 -usbdevice tablet -cpu qemu64,+sse2 -no-kvm-pit-reinjection -bootp /pxelinux.0 -boot n root 18160 0.2 0.0 0 0 ? S 16:17 0:03 [kvm-pit-wq] # debugfs tracing kvm info will repeat this: <...>-18161 [001] 18551.265812: kvm_inj_virq: irq 49 <...>-18161 [001] 18551.265813: kvm_entry: vcpu 0 <...>-18161 [001] 18551.265816: kvm_exit: reason npf rip 0xffffffff8007a3bc <...>-18161 [001] 18551.265817: kvm_page_fault: address fee000b0 error_code 6 <...>-18161 [001] 18551.265822: kvm_mmio: mmio write len 4 gpa 0xfee000b0 val 0x0 <...>-18161 [001] 18551.265823: kvm_apic: apic_write APIC_EOI = 0x0 <...>-18161 [001] 18551.265824: kvm_ack_irq: irqchip IOAPIC pin 2 <...>-18161 [001] 18551.265825: kvm_entry: vcpu 0 <...>-18161 [001] 18551.265960: kvm_exit: reason interrupt rip 0x2b936554d90b <...>-18161 [001] 18551.265961: kvm_entry: vcpu 0 <...>-18161 [001] 18551.266337: kvm_exit: reason interrupt rip 0x2b936251602d <...>-18161 [001] 18551.266338: kvm_apic_accept_irq: apicid 0 vec 239 (Fixed|edge) <...>-18161 [001] 18551.266339: kvm_inj_virq: irq 239 <...>-18161 [001] 18551.266339: kvm_entry: vcpu 0 <...>-18161 [001] 18551.266341: kvm_exit: reason npf rip 0xffffffff800791f7 <...>-18161 [001] 18551.266342: kvm_page_fault: address fee000b0 error_code 6 <...>-18161 [001] 18551.266345: kvm_mmio: mmio write len 4 gpa 0xfee000b0 val 0x0 <...>-18161 [001] 18551.266345: kvm_apic: apic_write APIC_EOI = 0x0 <...>-18161 [001] 18551.266346: kvm_entry: vcpu 0 <...>-18161 [001] 18551.266528: kvm_exit: reason io rip 0xffffffff8017258c <...>-18161 [001] 18551.266529: kvm_pio: pio_write at 0x3d4 size 2 count 1 <...>-18160 [000] 18551.266797: kvm_set_irq: gsi 0 level 1 source 1 <...>-18160 [000] 18551.266803: kvm_pic_set_irq: chip 0 pin 0 (edge|masked) <...>-18160 [000] 18551.266807: kvm_apic_accept_irq: apicid 0 vec 49 (Fixed|edge) <...>-18160 [000] 18551.266808: kvm_ioapic_set_irq: pin 2 dst 0 vec=49 (Fixed|physical|edge) <...>-18160 [000] 18551.266809: kvm_set_irq: gsi 0 level 0 source 1 <...>-18160 [000] 18551.266809: kvm_pic_set_irq: chip 0 pin 0 (edge|masked) <...>-18160 [000] 18551.266810: kvm_ioapic_set_irq: pin 2 dst 0 vec=49 (Fixed|physical|edge)