Live Migration KVM-84 Stock Vanilla 2.6.28.7

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Hey all,

I started testing live migration and seem to have his a snag... It appears to only occasionally work. Here is my setup:

2 Identical Machines:
Intel(R) Xeon(R) CPU 3050 @ 2.13GHz
8G Ram
Debian Lenny 64bit
Vanilla 2.6.28.7 kernel (loading kernel modules, not KVM-84 modules) KVM-84

Both machines are attached to an NFS server for the guest files.

Trying to transfer hosts using virtio for net and controller. Guests are running 2.6.28.7 with KVM enhancement stuff built in.

host started with:
/usr/local/kvm/bin/qemu-system-x86_64 -name lenny64/1
- -m1024 -nographic -monitor telnet:localhost:5501,server,nowait
- -serial telnet:localhost:5601,server,nowait
- -drivefile=/home/lenny64/hdisc.img,if=virtio,cache=writeback,boot=on
- -netnic,macaddr=52:54:00:12:00:01,model=virtio-nettap,ifname=tap1,script=/etc/kvm/kvm-ifup-br0

- -daemonize

Migration Host Started With
host started with:
/usr/local/kvm/bin/qemu-system-x86_64 -name lenny64/1
- -m1024 -nographic -monitor telnet:localhost:5501,server,nowait
- -serial telnet:localhost:5601,server,nowait
- -drivefile=/home/lenny64/hdisc.img,if=virtio,cache=writeback,boot=on
- -netnic,macaddr=52:54:00:12:00:01,model=virtio-nettap,ifname=tap1,script=/etc/kvm/kvm-ifup-br0

- -daemonize -incoming tcp:0:4601

Execute migrate tcp:migrationhost:4601

Sometimes it moves without a problem, other times the migrated host hangs without reponse...

Let me know what I can do to help fix this feature, or if I'm doing something wrong...

Thanks in advance,

Stu Sheldon
ACT USA

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Update on this...

The 32bit guests migrate fine if they are under low load. It looks like the 64bit guests consistently become unresponsive during the migration.

Stu

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