ebaf416f95
illumos/illumos-gate@af868f46a5
af868f46a5
https://www.illumos.org/issues/6914
FreeBSD note: only a ZFS part of the change is merged, changes to the VM
subsystem are not ported (obviously). Also, now that FreeBSD has
vmem(9) we don't have to ifdef-out the code that uses it.
MFC after: 2 weeks