Hi,
I am using qemu 2.1.2 and some VMs hang while playing videos.
QEMU parameters and stack information is as follows:
/usr/bin/qemu-system-x86_64
-name S398_ABC-047
-S -machine pc-i440fx-2.1,accel=kvm,usb=off
-m 1024
-realtime mlock=off
-smp 1,sockets=1,cores=1,threads=1
-uuid 2f9fa97a-0061-436c-a40c-e7abc3d0cdb1
-no-user-config -nodefaults
-chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/S398_ABC-047.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control
-rtc base=localtime
-no-shutdown -global PIIX4_PM.disable_s3=1
-global PIIX4_PM.disable_s4=0 -boot strict=on
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5
-drive file=/opt/cvm/win7_64_S398_ABC-047.inst,if=none,id=drive-ide0-0-0,format=qcow2,cache=writeback,discard=unmap
-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1
-drive file=/opt/data/hugedisk/win7_64_S398_ABC-047_share.add,if=none,id=drive-ide0-0-1,format=qcow2,cache=writeback
-device ide-hd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -netdev tap,fd=21,id=hostnet0,vhost=on,vhostfd=23
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:19:a6:93,bus=pci.0,addr=0x3 -chardev pty,id=charserial0
-device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1
-device isa-serial,chardev=charserial1,id=serial1 -chardev spicevmc,id=charchannel0,name=vdagent
-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -chardev spiceport,id=charchannel1,name=webcam
-device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.webcam
-device usb-tablet,id=input0 -spice port=5902,addr=0.0.0.0,disable-ticketing,seamless-migration=on -vnc
0.0.0.0:3 -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x4
-device hda-micro,id=sound0-codec0,bus=sound0.0,cad=0 -device hda-duplex,id=sound0-codec1,bus=sound0.0,cad=1
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6
-readconfig /etc/qemu/ich9-ehci-uhci.cfg
-chardev spicevmc,name=usbredir,id=usbredirchardev1 -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1,bus=ehci.0
-chardev spicevmc,name=usbredir,id=usbredirchardev2 -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2,bus=ehci.0
-chardev spicevmc,name=usbredir,id=usbredirchardev3 -device usb-redir,chardev=usbredirchardev3,id=usbredirdev3,bus=ehci.0
-cpu SandyBridge,host=on,+vmx,model_id=Intel(R) Xeon(R) CPU E5-26xx series,hv-relaxed=on,hv-time=on,hv-spinlocks=0x1fff
Thread 4 (Thread 0x7fa09a527700 (LWP 48069)):
#0 0x00007fa09ec7b3e7 in ppoll () from /lib64/libc.so.6
#1 0x00007fa0a2f7e27b in qemu_poll_ns (fds=<value optimized out>,
nfds=<value optimized out>, timeout=<value optimized out>)
at /root/pq/rcc/merge/qemu/qemu-timer.c:314
#2 0x00007fa0a2f7edf4 in aio_poll (ctx=0x7fa0a5835620, blocking=true)
at /root/pq/rcc/merge/qemu/aio-posix.c:250
#3 0x00007fa0a2f782e8 in bdrv_drain_all ()
at /root/pq/rcc/merge/qemu/block.c:1930
#4 0x00007fa0a2eb602a in bmdma_cmd_writeb (bm=0x7fa0a5ce8cc8, val=0)
at /root/pq/rcc/merge/qemu/hw/ide/pci.c:314
#5 0x00007fa0a2d17e68 in access_with_adjusted_size (addr=0,
value=0x7fa09a526aa0, size=1, access_size_min=<value optimized out>,
access_size_max=<value optimized out>,
access=0x7fa0a2d19b10 <memory_region_write_accessor>, mr=0x7fa0a5ce8e30)
at /root/pq/rcc/merge/qemu/memory.c:481
#6 0x00007fa0a2d1988c in memory_region_dispatch_write (mr=0x7fa0a5ce8e30,
addr=0, val=<value optimized out>, size=1)
at /root/pq/rcc/merge/qemu/memory.c:1143
#7 io_mem_write (mr=0x7fa0a5ce8e30, addr=0, val=<value optimized out>, size=1)
at /root/pq/rcc/merge/qemu/memory.c:1976
#8 0x00007fa0a2cdd73a in address_space_rw (as=0x7fa0a3412380,
addr=<value optimized out>, buf=<value optimized out>, len=1,
is_write=true) at /root/pq/rcc/merge/qemu/exec.c:2087
#9 0x00007fa0a2d155c4 in kvm_handle_io (cpu=<value optimized out>)
at /root/pq/rcc/merge/qemu/kvm-all.c:1597
#10 kvm_cpu_exec (cpu=<value optimized out>)
at /root/pq/rcc/merge/qemu/kvm-all.c:1734
#11 0x00007fa0a2d0470c in qemu_kvm_cpu_thread_fn (arg=0x7fa0a5ca95c0)
at /root/pq/rcc/merge/qemu/cpus.c:874
#12 0x00007fa0a17ec9d1 in start_thread () from /lib64/libpthread.so.0
#13 0x00007fa09ec849dd in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x7fa0995ff700 (LWP 48071)):
#0 0x00007fa09ec7b1b3 in poll () from /lib64/libc.so.6
#1 0x00007fa09fbfb306 in ?? () from /usr/lib64/libspice-server.so.1
#2 0x00007fa0a17ec9d1 in start_thread () from /lib64/libpthread.so.0
#3 0x00007fa09ec849dd in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x7fa098bff700 (LWP 48072)):
#0 0x00007fa0a17f05bc in pthread_cond_wait@@GLIBC_2.3.2 ()
from /lib64/libpthread.so.0
#1 0x00007fa0a2fca499 in qemu_cond_wait (cond=<value optimized out>,
mutex=<value optimized out>)
at /root/pq/rcc/merge/qemu/util/qemu-thread-posix.c:135
#2 0x00007fa0a2f6c9d3 in vnc_worker_thread_loop (queue=0x7fa0a5e62170)
at /root/pq/rcc/merge/qemu/ui/vnc-jobs.c:222
#3 0x00007fa0a2f6cf80 in vnc_worker_thread (arg=0x7fa0a5e62170)
at /root/pq/rcc/merge/qemu/ui/vnc-jobs.c:323
#4 0x00007fa0a17ec9d1 in start_thread () from /lib64/libpthread.so.0
#5 0x00007fa09ec849dd in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x7fa0a2c1d9c0 (LWP 48065)):
#0 0x00007fa0a17f3264 in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00007fa0a17ee508 in _L_lock_854 () from /lib64/libpthread.so.0
#2 0x00007fa0a17ee3d7 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3 0x00007fa0a2fca719 in qemu_mutex_lock (mutex=<value optimized out>)
at /root/pq/rcc/merge/qemu/util/qemu-thread-posix.c:76
#4 0x00007fa0a2f7cedb in os_host_main_loop_wait (
nonblocking=<value optimized out>)
at /root/pq/rcc/merge/qemu/main-loop.c:232
#5 main_loop_wait (nonblocking=<value optimized out>)
at /root/pq/rcc/merge/qemu/main-loop.c:484
#6 0x00007fa0a2df9aeb in main_loop (argc=<value optimized out>,
argv=<value optimized out>, envp=<value optimized out>)
at /root/pq/rcc/merge/qemu/vl.c:2016
#7 main (argc=<value optimized out>, argv=<value optimized out>,
envp=<value optimized out>) at /root/pq/rcc/merge/qemu/vl.c:4640
Did anyone meet this problem before? If I want to fix it, which patches I could apply.
Thank you very much!
Regards,
Qian Peng