I have the same symptoms with two trusty-amd64 virtual hosts:
* win2003, linux guests hang for a period of time (~5 seconds, half of a minute and more)
* win2008 blue screen with the same message
This happens with kernels (host):
Linux vsrv7 3.13.0-27-generic #50-Ubuntu SMP Thu May 15 18:06:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Linux vsrv9 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Qemu version: 2.0.0+dfsg-2ubuntu1.1
I have the same symptoms with two trusty-amd64 virtual hosts:
* win2003, linux guests hang for a period of time (~5 seconds, half of a minute and more)
* win2008 blue screen with the same message
This happens with kernels (host): 2ubuntu1. 1
Linux vsrv7 3.13.0-27-generic #50-Ubuntu SMP Thu May 15 18:06:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Linux vsrv9 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Qemu version: 2.0.0+dfsg-
Here are qemu params of guests that definately hang: trusty, accel=kvm, usb=off -m 4096 -realtime mlock=off -smp 2,sockets= 2,cores= 1,threads= 1 -uuid ab7f1e0b- e82e-ddb7- b743-903b8732e3 33 -no-user-config -nodefaults -chardev socket, id=charmonitor, path=/var/ lib/libvirt/ qemu/m. monitor, server, nowait -mon chardev= charmonitor, id=monitor, mode=control -rtc base=utc -no-shutdown -boot order=c, menu=on, strict= on -device piix3-usb- uhci,id= usb,bus= pci.0,addr= 0x1.0x2 -device virtio- scsi-pci, id=scsi0, bus=pci. 0,addr= 0x4 -drive file=/dev/ vg00/kvm_ m_1,if= none,id= drive-scsi0- 0-0-0,format= raw,cache= none,aio= native -device scsi-hd, bus=scsi0. 0,channel= 0,scsi- id=0,lun= 0,drive= drive-scsi0- 0-0-0,id= scsi0-0- 0-0 -netdev tap,fd= 26,id=hostnet0, vhost=on, vhostfd= 29 -device virtio- net-pci, netdev= hostnet0, id=net0, mac=52: 54:00:3a: 76:ad,bus= pci.0,addr= 0x3 -chardev pty,id=charserial0 -device isa-serial, chardev= charserial0, id=serial0 -vnc 127.0.0.1:3 -device VGA,id= video0, bus=pci. 0,addr= 0x2 -device virtio- balloon- pci,id= balloon0, bus=pci. 0,addr= 0x5 accel=kvm, usb=off -m 10000 -realtime mlock=off -smp 16,sockets= 16,cores= 1,threads= 1 -uuid 4df29f97- 7e47-8af3- 0009-a5395c28e3 c5 -no-user-config -nodefaults -chardev socket, id=charmonitor, path=/var/ lib/libvirt/ qemu/ts2. monitor, server, nowait -mon chardev= charmonitor, id=monitor, mode=control -rtc base=localtime -no-shutdown -boot order=c, menu=on, strict= on -device piix3-usb- uhci,id= usb,bus= pci.0,addr= 0x1.0x2 -device virtio- scsi-pci, id=scsi0, bus=pci. 0,addr= 0x8 -drive file=/dev/ vg00/kvm_ ts2_1,if= none,id= drive-scsi0- 0-0-0,format= raw,cache= none,aio= native -device scsi-hd, bus=scsi0. 0,channel= 0,scsi- id=0,lun= 0,drive= drive-scsi0- 0-0-0,id= scsi0-0- 0-0 -drive file=/dev/ vg00/kvm_ ts2_2,if= none,id= drive-scsi0- 0-0-1,format= raw,cache= none,aio= native -device scsi-hd, bus=scsi0. 0,channel= 0,scsi- id=0,lun= 1,drive= drive-scsi0- 0-0-1,id= scsi0-0- 0-1 -drive file=/dev/ vg00/kvm_ ts2_3,if= none,id= drive-scsi0- 0-0-2,format= raw,cache= none,aio= native -device scsi-hd, bus=scsi0. 0,channel= 0,scsi- id=0,lun= 2,drive= drive-scsi0- 0-0-2,id= scsi0-0- 0-2 -netdev tap,fd= 26,id=hostnet0, vhost=on, vhostfd= 30 -device virtio- net-pci, netdev= hostnet0, id=net0, mac=52: 54:00:ac: 28:3a,bus= pci.0,addr= 0x3 -chardev pty,id=charserial0 -device isa-serial, chardev= charserial0, id=serial0 -device usb-tablet, id=input0 -vnc 127.0.0.1:0 -device VGA,id= video0, bus=pci. 0,addr= 0x2 -device virtio- balloon- pci,id= balloon0, bus=pci. 0,addr= 0x4 trusty, accel=kvm, usb=off -m 8192 -realtime mlock=off -smp 4,sockets= 4,cores= 1,threads= 1 -uuid d9f9b238- 5cb6-59a8- f3aa-ccfc665604 0a -no-user-config -nodefaults -chardev socket, id=charmonitor, path=/var/ lib/libvirt/ qemu/ts4. monitor, server, nowait -mon chardev= charmonitor, id=monitor, mode=control -rtc base=localtime -no-shutdown -boot order=c, menu=on, strict= on -device piix3-usb- uhci,id= usb,bus= pci.0,addr= 0x1.0x2 -drive file=/dev/ vg00/kvm_ ts4_1,if= none,id= drive-virtio- disk0,format= raw,cache= none,aio= native -device virtio- blk-pci, scsi=off, bus=pci. 0,addr= 0x4,drive= drive-virtio- disk0,id= virtio- disk0 -netdev tap,fd= 26,id=hostnet0, vhost=on, vhostfd= 27 -device virtio- net-pci, netdev= hostnet0, id=net0, mac=52: 54:00:37: 6b:8d,bus= pci.0,addr= 0x3 -chardev pty,id=charserial0 -device isa-serial, chardev= charserial0, id=serial0 -device usb-tablet, id=input0 -vnc 127.0.0.1:2 -device VGA,id= video0, bus=pci. 0,addr= 0x2 -device virtio- balloon- pci,id= balloon0, bus=pci. 0,addr= 0x5
* precise with 3.11:
qemu-system-x86_64 -enable-kvm -name m -S -machine pc-i440fx-
* win 2008 r2:
qemu-system-x86_64 -enable-kvm -name ts2 -S -machine pc-1.0,
* win 2003:
qemu-system-x86_64 -enable-kvm -name ts4 -S -machine pc-i440fx-