On 02/01/2013 12:08 PM, James wrote:

Hi,

Could anyone provide (or point me to) information on how KSM merging behaves when performing live migrations? Does libvirt perform any special work to trigger KSM scanning of the migrated pages?

That's probably a question better asked to the qemu folks; the most libvirt would be able to do is pass a command line argument to qemu that says whether qemu will enable or disable merging, but it is the qemu process where the guest memory resides that would even need merging. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org