On 11/10/2015 9:34 AM, Chuck Lever wrote:
2. Is there a reason IB is not using the allphys MR for RDMA Read?
That would be much more efficient. On the NFS server that MR isn't
exposed, thus it is safe to use.

True, but only if the layout of the buffer's physical pages do not
exceed the local RDMA Read scatter limit. If the size is large then
the privileged MR will require additional RDMA Read operations, which
can be more expensive. It's certainly a valid optimization, if the
buffer "fits".

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to