[Qemu-devel] setting migrate_downtime results in halted vm

[Stefan Priebe]

Hello list,

i'm using qemu 1.3 and migration works fine if i do not set 
migrate_downtime.

If i set migrate_downtime to 1s or 0.5s or 0.3s the VM halts immediatly 
i cannot even connect to the qmp socket anymore and migration takes 5-10 
minutes or never finishes.

I see high cpu usage on source vm while it hangs.

VM was for all tests IDLE and was using 1GB of 4GB mem.

Do you have any ideas what happens here?

Greets,
Stefan