I also did a test using RDMA + cgroup, and the kernel killed my QEMU :)
So, infiniband is not smart enough to know how to avoid pinning a zero
page, I guess.
- Michael
On 03/19/2013 01:14 PM, Paolo Bonzini wrote:
Il 19/03/2013 18:09, Michael R. Hines ha scritto:
Allowing QEMU to swap due to a cgroup limit during migration is a viable
overcommit option?
I'm trying to keep an open mind, but that would kill the migration
time.....
Would it swap? Doesn't the kernel back all zero pages with a single
copy-on-write page? If that still accounts towards cgroup limits, it
would be a bug.
Old kernels do not have a shared zero hugepage, and that includes some
distro kernels. Perhaps that's the problem.
Paolo
