Il 19/03/2013 18:40, Michael R. Hines ha scritto: > registration scheme would not work with cgroups because we would be > attempting to pin zero pages (for no reason) that cgroups has already > kicked out, which would defeat the purpose of using cgroups.
Yeah, pinning would be a problem. > So, if I submit a separate patch to fix this, would you guys review it? > (Using /dev/pagemap). Sorry about the ignorance, but what is /dev/pagemap? :) > Unless there is a better idea? Does KVM expose the necessary mappings? We could have the balloon driver track the pages. I and Michael had some initial work a few months ago on extending the virtio-balloon spec to allow this. It went nowhere, though. Still, at this point this is again an RDMA-specific problem, I don't think it would be that bad if the first iterations of RDMA didn't support ballooning/overcommit. Paolo
