[Qemu-devel] 答复: A crash problem about " loadvm"

[Liuji (Jeremy)]

Hi, Wenchao

Thanks for your reply.

Could you tell me which step I missed? I checked the relevant information. But 
there seems to be no other operation before "loadvm".


Best Regards,

Jeremy Liu

> > Hello, everyone
> >
> > I found a problem about "loadvm", when I use Spice.
> >
> > Host OS: Fedora 17
> > Qemu: 1.4.0
> > Spice: 0.12.2
> > Quest OS: WinXP
> >
> > 1) Use the following command to start the VM:
> >      qemu-kvm -enable-kvm -name winxp -M pc-0.15 -m 1024 -smp 2 -boot
> c -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=/home/test/winxp.qcow2,if=virtio,index=0,format=qcow2
> >      -net nic,model=virtio,macaddr=52:54:00:05:11:12 -monitor stdio
> -chardev spicevmc,id=charchannel0,name=vdagent
> >      -device
> virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,na
> me=com.redhat.spice.0 -chardev pty,id=charchannel1
> >      -device
> virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,na
> me=arbitrary.virtio.serial.port.name -device usb-tablet,id=input0
> >      -spice
> port=3001,addr=186.100.8.131,disable-ticketing,plaintext-channel=main,plaint
> ext-channel=playback,plaintext-channel=record,image-compression=auto_glz
> >      -vga qxl -global qxl-vga.vram_size=67108864 -device
> AC97,id=sound0,bus=pci.0,addr=0x4
> > 2) Use spice client to connect the VM.
> > 3) Exec the "savevm" command in the qemu monitor.
> > 4) List snapshot information:
> >      info snapshots
> >      ID        TAG                 VM SIZE                DATE
> VM CLOCK
> >      1         vm-20130330181626      224M 2013-03-30 18:16:26
> 00:00:17.294
> >
> > 5) Load the snapshot. But the process crashed:
> >      loadvm vm-20130330181626
> >      red_dispatcher_loadvm_commands:
> >      Segmentation fault (core dumped)
> >
> > I use the GDB to analyze the core-dump file:
> >      #0  0x00007f6cbdc37a15 in spice_char_device_write_to_device
> (dev=0x7f6cc5248320) at char_device.c:439
> >      439      sif = SPICE_CONTAINEROF(dev->sin->base.sif,
> SpiceCharDeviceInterface, base);
> >      (gdb) p dev
> >      $1 = (SpiceCharDeviceState *) 0x7f6cc5248320
> >      (gdb) p dev->sin
> >      $2 = (SpiceCharDeviceInstance *) 0x0
> >
> > I have always found this problem after the
> commit(fc24f3bd2ed4c97c99ad40e747732ae46dff2009 "spice: notify spice
> server on vm start/stop").
> >
> > Could you give me some advices to debug this problem?
> >
> >
> > ------------------
> > Best Regards,
> >
> > Jeremy Liu
> >
>   Seems some step missing for spice server, need to check the status in
> migration.
> 
> 
> --
> Best Regards
> 
> Wenchao Xia