Re: [Qemu-devel] After executing "savevm", the QEMU process is hanging

[Stefan Hajnoczi]

On Mon, Apr 01, 2013 at 11:45:13AM +0000, Liuji (Jeremy) wrote:
> Hello, everyone
> 
> After executing the "savevm" command, the QEMU process is hanging.
> But in the v1.4.0, it's no problem.
> 
> Host OS: Fedora 17 x86_64
> Qemu: the latest(2013-04-01)
> 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,name=com.redhat.spice.0
>  -chardev pty,id=charchannel1 
>     -device 
> virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=arbitrary.virtio.serial.port.name
>  -device usb-tablet,id=input0 
>     -spice 
> port=3001,addr=186.100.8.131,disable-ticketing,plaintext-channel=main,plaintext-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) Execute the "savevm" command in the qemu monitor.
>    After a long time (>20minute), the qemu process is still hanging.
> 
> Who can give me some advice?

Have you tried qemu.git/master?

Once you find out which version works and which is broken, you can use
git-bisect(1) to find the commit that broke "savevm".

Stefan