[Qemu-devel] migrate cancel bug in latest qemu upstream

[Amos Kong <akong@redhat.com>]

Hi quintela, I found a migrate bug in Autotest result, not sure if
it's already known.

| commit fa3889162ff724d09eb6b6bd06ba54769100a77f
| Merge: 6e72a00 a4960ef
| Author: Anthony Liguori <aliguori@us.ibm.com>
| Date:   Sun Mar 10 20:39:17 2013 -0500


It can be caught by migrate.mig_cancel case in Autotest framework.
Manual reproduce method: cancel migrate before migration completes

(src monitor) migrate -d tcp:0:1234
(src monitor) migrate cancel

Destination vm exits expectedly
  qemu: warning: error while loading state section id 2

Problem:
 The migrate status of source vm is 'failed' (it should be 'canceled')
 (monitor hmp1) Response to 'info migrate'
 (monitor hmp1)    capabilities: xbzrle: off
 (monitor hmp1)    Migration status: failed
 (monitor hmp1)    total time: 0 milliseconds


Long cmdline: (can reproduce)
# qemu-system-x86_64 --enable-kvm -name 'vm0' -nodefaults -chardev
socket,id=serial_id_serial1,path=/tmp/serial-serial1-20130311-182651-kfslPrch,server,nowait
-device isa-serial,chardev=serial_id_serial1 -chardev
socket,id=seabioslog_id_20130311-182651-kfslPrch,path=/tmp/seabios-20130311-182651-kfslPrch,server,nowait
-device isa-debugcon,chardev=seabioslog_id_20130311-182651-kfslPrch,iobase=0x402
-device ich9-usb-uhci1,id=usb1 -drive
file='/tmp/kvm_autotest_root/images/RHEL-Server-6.3-64-virtio.qcow2',if=none,id=virtio0
-device virtio-blk-pci,drive=virtio0 -device
e1000,netdev=idkrCwff,mac='9a:87:88:89:8a:8b',id='idxiFFqe' -netdev
tap,id=idkrCwff -m 2048 -smp 4,maxcpus=4,cores=1,threads=1,sockets=4
-cpu 'Penryn' -M pc -device
usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 -vnc :1 -vga std -rtc
base=utc,clock=host,driftfix=none -boot order=cdn,once=c,menu=off

Simple cmdline: (can reproduce)
# qemu-system-x86_64  --enable-kvm
 /tmp/kvm_autotest_root/images/RHEL-Server-6.3-64-virtio.qcow2 -m
 2048  -vnc :1  -monitor stdio -net none

Thanks, Amos