tree f89383b033863f6d3ea6b2666a8eb9c50c3927ec
parent 2ffc871a574daa760ef4f7750e0a36187a45754a
author Chuck Lever <chuck.lever@oracle.com> 1467222856 -0400
committer Anna Schumaker <Anna.Schumaker@Netapp.com> 1468266643 -0400

xprtrdma: Place registered MWs on a per-req list

Instead of placing registered MWs sparsely into the rl_segments
array, place these MWs on a per-req list.

ro_unmap_{sync,safe} can then simply pull those MWs off the list
instead of walking through the array.

This change significantly reduces the size of struct rpcrdma_req
by removing nsegs and rl_mw from every array element.

As an additional clean-up, chunk co-ordinates are returned in the
"*mw" output argument so they are no longer needed in every
array element.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>