Re: [Qemu-devel] qemu-kvm aborts - vhost_dev_unassign_memory: Assertion `to >= 0' failed.

[Wen Congyang]

At 08/03/2011 05:01 PM, Avi Kivity Write:
> On 08/01/2011 08:44 PM, David Ahern wrote:
>> qemu-kvm.git as of:
>>
>> commit dacdc4b10bafbb21120e1c24a9665444768ef999
>> Merge: 7b69d4f 0af4922
>> Author: Avi Kivity<address@hidden>
>> Date:   Sun Jul 31 11:42:26 2011 +0300
>>
>>      Merge branch 'upstream-merge' into next
>>
>> is aborting with the error:
>>
>> qemu-kvm: qemu-kvm.git/hw/vhost.c:123: vhost_dev_unassign_memory:
>> Assertion `to>= 0' failed.
>> Aborted
> 
> Full command line please?

I use the upstream qemu, and meet the same problem.

I use libvirt to start vm. Here is the command line:
2011-08-03 13:58:21.157: starting up
LC_ALL=C 
PATH=/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
 HOME=/root USER=root LOGNAME=root QEMU_AUDIO_DRV=none /usr/local2/bin/
qemu-system-x86_64 -S -M pc-0.14 -enable-kvm -m 512 -smp 
4,sockets=4,cores=1,threads=1 -name vm1 -uuid 
a1cd0309-72a3-48b7-835d-212c86de407f -nodefconfig -nodefaults -chardev soc
ket,id=charmonitor,path=/var/lib/libvirt/qemu/vm1.monitor,server,nowait -mon 
chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown 
-device lsi,id=scsi0,bu
s=pci.0,multifunction=on,addr=0x5.0x0 -drive 
file=/var/lib/libvirt/images/vm1.img,if=none,id=drive-ide0-0-0,format=qcow2,cache=writethrough
 -device ide-drive,bus=ide.0,unit=0,dr
ive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive 
file=/var/lib/libvirt/images/test.iso,if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw
 -device ide-drive,bus=ide.1,
unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive 
file=/var/lib/libvirt/images/test.img,if=none,id=drive-virtio-disk0,format=qcow2,serial=Fujitsu-virtio-0001
 -device virtio-blk-pci
,bus=pci.0,multifunction=on,addr=0x7.0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2
 -netdev tap,fd=25,id=hostnet0,vhost=on,vhostfd=26 -device 
virtio-net-pci,netdev=hos
tnet0,id=net0,mac=52:54:00:04:72:f2,bus=pci.0,multifunction=on,addr=0x3.0x0 
-netdev tap,fd=27,id=hostnet1 -device 
rtl8139,netdev=hostnet1,id=net1,mac=52:54:00:04:72:f3,bus=pci.0
,multifunction=on,addr=0x6.0x0 -chardev pty,id=charserial0 -device 
isa-serial,chardev=charserial0,id=serial0 -usb -vnc 0.0.0.0:1 -vga cirrus 
-device virtio-balloon-pci,id=balloo
n0,bus=pci.0,multifunction=on,addr=0x4.0x0
char device redirected to /dev/pts/7
qemu-system-x86_64: /home/wency/source/qemu/hw/vhost.c:123: 
vhost_dev_unassign_memory: Assertion `to >= 0' failed.
2011-08-03 13:58:21.400: shutting down

If I do not use vhost(command line does not include vhost=on,vhostfd=26), the 
vm can start succefully.

Thanks
Wen Congyang

>