[PATCH v2 00/20] NFS/RDMA client for 3.20

[Chuck Lever <chuck.lever@oracle.com>]

The following series of patches for the Linux NFS client breaks up
the per-transport buffer pool data structures to help them scale
better with the size of SEND/RECV buffers (the inline threshold),
the maximum NFS r/wsize, and the number of RDMA credits (concurrent
RPC requests).

The primary change is that the header send buffers have been split
from struct rpcrdma_req. Specific benefits are outlined in the patch
descriptions.

More pre-requisites are required. Changes to raise the maximum
r/wsize and other limits are left for a future merge window.

See the topic branch "nfs-rdma-for-3.20" at:

  git://git.linux-nfs.org/projects/cel/cel-2.6.git

Changes since v1:
 - Rebased on v3.19-rc4
 - One short description fixed
 - linux-rdma included this time (sorry for the noise)

---

Chuck Lever (20):
      xprtrdma: human-readable completion status
      xprtrdma: Modernize htonl and ntohl
      xprtrdma: Display XIDs in host byte order
      xprtrdma: Clean up hdrlen
      xprtrdma: Rename "xprt" and "rdma_connect" fields in struct rpcrdma_xprt
      xprtrdma: Remove rpcrdma_ep::rep_ia
      xprtrdma: Remove rl_mr field, and the mr_chunk union
      xprtrdma: Move credit update to RPC reply handler
      xprtrdma: Remove rpcrdma_ep::rep_func and ::rep_xprt
      xprtrdma: Free the pd if ib_query_qp() fails
      xprtrdma: Take struct ib_device_attr off the stack
      xprtrdma: Take struct ib_qp_attr and ib_qp_init_attr off the stack
      xprtrdma: Simplify synopsis of rpcrdma_buffer_create()
      xprtrdma: Refactor rpcrdma_buffer_create() and rpcrdma_buffer_destroy()
      xprtrdma: Add struct rpcrdma_regbuf and helpers
      xprtrdma: Allocate RPC send buffer separately from struct rpcrdma_req
      xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req
      xprtrdma: Allocate RPC/RDMA receive buffer separately from struct rpcrdma_rep
      xprtrdma: Allocate zero pad separately from rpcrdma_buffer
      xprtrdma: Clean up after adding regbuf management


 include/linux/sunrpc/rpc_rdma.h |   14 +
 include/linux/sunrpc/svc_rdma.h |    2 
 net/sunrpc/xprtrdma/rpc_rdma.c  |  108 ++++++----
 net/sunrpc/xprtrdma/transport.c |  179 +++++++----------
 net/sunrpc/xprtrdma/verbs.c     |  411 ++++++++++++++++++++++++---------------
 net/sunrpc/xprtrdma/xprt_rdma.h |  111 +++++++----
 6 files changed, 478 insertions(+), 347 deletions(-)

--
Chuck Lever