Description of problem: Guest's installation process will hang up while doing migration hit ENOSPAC Steps to reproduce, preparation: please use iscsi and had better have the source and destination hosts connect to the third-party server in order to gain an accurate results. 1.a.lvcreate -L 256M migrate -n dengminsrc qemu-img create -f qcow2 /dev/migrate/dengminsrcv 20G b.boot guest on source host /usr/libexec/qemu-kvm -rtc-td-hack -usbdevice tablet -no-hpet -drive file=/dev/migrate/dengminsrc,if=virtio,boot=on,werror=stop,cache=none,format=qcow2,media=disk -cpu qemu64,+sse2 -smp 2 -m 1G -net nic,macaddr=00:12:24:57:a8:2e,model=virtio,vlan=0 -net tap,script=/etc/qemu-ifup,vlan=0 -uuid `uuidgen` -vnc :2 -boot dc -balloon none -monitor stdio -drive file=/home/RHEL5.6-Server-20110106.0-x86_64-DVD.iso,if=ide,werror=stop,cache=none,format=raw,media=cdrom 2.install OS via vncviewer and check VM status in monitor 3.enlarge lvm after VM is paused and then continue VM lvextend -L +500M /dev/migrate/dengminsrc on source 4.boot guest on destination /usr/libexec/qemu-kvm -rtc-td-hack -usbdevice tablet -no-hpet -drive file=/dev/migrate/dengminsrc,if=virtio,boot=on,werror=stop,cache=none,format=qcow2,media=disk -cpu qemu64,+sse2 -smp 2 -m 1G -net nic,macaddr=00:12:24:57:a8:2e,model=virtio,vlan=0 -net tap,script=/etc/qemu-ifup,vlan=0 -uuid `uuidgen` -vnc :2 -boot dc -balloon none -monitor stdio -drive file=/home/RHEL5.6-Server-20110106.0-x86_64-DVD.iso,if=ide,werror=stop,cache=none,format=raw,media=cdrom -incoming tcp:0:1111 5.a.do live migration from source to destination host b.(qemu)info migrate on source Migration status: completed 6. (qemu) info status on destination VM status: running 7.open destination guest via vncviewer to check the installation status Expected results: The installation goes on or if guest stop due to ENOSPAC the monitor should provide correct message on destination host Actual results: The installation hang up and user cannot finish installation. Addtitional info, Notes,at step 3,if you enlarge 2G to the lvm user won't hit the issue.
kernel&kvm 2.6.18-256.el5 kmod-kvm-83-231.el5
Sounds exactly like the same issue in BZ700701 *** This bug has been marked as a duplicate of bug 700701 ***
Reopen this one , They're different issue I think this bug means :migration finished ,but steps of installation in the guest hang. Bug 700701 means :migrate *never* finished .
It's too late for RHEL 5.7, moving to RHEL 5.8.