Comment 17 for bug 588293

I now found the right commit

http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commit;h=012d4869c1eb195e83f159ed7b2bced33f37f960

A virtual Machine running with this for about an hour still uses not more memory than when it was started.

Attached a patched version of kvm for amd64