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Re: [Qemu-block] [QEMU 2.1.2] block in bdrv_drain_all()
From: |
Fam Zheng |
Subject: |
Re: [Qemu-block] [QEMU 2.1.2] block in bdrv_drain_all() |
Date: |
Tue, 1 Dec 2015 18:30:41 +0800 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, 12/01 17:53, Qian Peng wrote:
> Hi,
>
>
> I am using qemu 2.1.2 and some VMs hang while playing videos.
Does the problem reproduce with current head?
Fam
>
>
> 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>)
> #2 0x00007fa0a2f7edf4 in aio_poll (ctx=0x7fa0a5835620, blocking=true)
> #3 0x00007fa0a2f782e8 in bdrv_drain_all ()
> #4 0x00007fa0a2eb602a in bmdma_cmd_writeb (bm=0x7fa0a5ce8cc8, val=0)
> #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)
> #6 0x00007fa0a2d1988c in memory_region_dispatch_write (mr=0x7fa0a5ce8e30,
> addr=0, val=<value optimized out>, size=1)
> #7 io_mem_write (mr=0x7fa0a5ce8e30, addr=0, val=<value optimized out>,
> size=1)
> #8 0x00007fa0a2cdd73a in address_space_rw (as=0x7fa0a3412380,
> addr=<value optimized out>, buf=<value optimized out>, len=1,
> is_write=true)
> #9 0x00007fa0a2d155c4 in kvm_handle_io (cpu=<value optimized out>)
> #10 kvm_cpu_exec (cpu=<value optimized out>)
> #11 0x00007fa0a2d0470c in qemu_kvm_cpu_thread_fn (arg=0x7fa0a5ca95c0)
> #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>)
> #2 0x00007fa0a2f6c9d3 in vnc_worker_thread_loop (queue=0x7fa0a5e62170)
> #3 0x00007fa0a2f6cf80 in vnc_worker_thread (arg=0x7fa0a5e62170)
> #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>)
> #4 0x00007fa0a2f7cedb in os_host_main_loop_wait (
> nonblocking=<value optimized out>)
> #5 main_loop_wait (nonblocking=<value optimized out>)
> #6 0x00007fa0a2df9aeb in main_loop (argc=<value optimized out>,
> argv=<value optimized out>, envp=<value optimized out>)
> #7 main (argc=<value optimized out>, argv=<value optimized out>,
> envp=<value optimized out>)
>
>
> Did anyone meet this problem before? If I want to fix it, which patches I
> could apply.
>
>
> Thank you very much!
>
>
> Regards,
> Qian Peng