I'm off to investigate whether it's a VM bug, or whether I should
make the balloon driver a little friendlier on the VM. Chances
are I'll end up sending out a patch later, either here or to the
linux-kernel mailing list ;)
Probably the balloon driver being unfriendly. Rate limiting was on the list
after getting the 2.6 port, ctrlif, etc working. We also need to fix the way
ballooned pages are recorded, since the current scheme breaks under
migration.
Expect a unified driver for 2.4 and 2.6 shortly.
Mark