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
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