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| author | Chuck Lever <chuck.lever@oracle.com> | 2015-01-21 11:04:16 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-01-30 10:47:49 -0500 |
| commit | 85275c874eaeb92fb2a78a1d4ebb1ff4b0f7b732 (patch) | |
| tree | a9816da15586ef6b23196992dd777e3656fb9f6b /net/sunrpc/xprtrdma/transport.c | |
| parent | 0ca77dc372110cbed4dbac5e867ffdc60ebccf6a (diff) | |
| download | talos-obmc-linux-85275c874eaeb92fb2a78a1d4ebb1ff4b0f7b732.tar.gz talos-obmc-linux-85275c874eaeb92fb2a78a1d4ebb1ff4b0f7b732.zip | |
xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req
The rl_base field is currently the buffer where each RPC/RDMA call
header is built.
The inline threshold is an agreed-on size limit to for RDMA SEND
operations that pass between client and server. The sum of the
RPC/RDMA header size and the RPC header size must be less than or
equal to this threshold.
Increasing the r/wsize maximum will require MAX_SEGS to grow
significantly, but the inline threshold size won't change (both
sides agree on it). The server's inline threshold doesn't change.
Since an RPC/RDMA header can never be larger than the inline
threshold, make all RPC/RDMA header buffers the size of the
inline threshold.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/transport.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index a9d566227e7e..2c2fabe99d84 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -470,6 +470,8 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) if (req == NULL) return NULL; + if (req->rl_rdmabuf == NULL) + goto out_rdmabuf; if (req->rl_sendbuf == NULL) goto out_sendbuf; if (size > req->rl_sendbuf->rg_size) @@ -480,6 +482,13 @@ out: req->rl_connect_cookie = 0; /* our reserved value */ return req->rl_sendbuf->rg_base; +out_rdmabuf: + min_size = RPCRDMA_INLINE_WRITE_THRESHOLD(task->tk_rqstp); + rb = rpcrdma_alloc_regbuf(&r_xprt->rx_ia, min_size, flags); + if (IS_ERR(rb)) + goto out_fail; + req->rl_rdmabuf = rb; + out_sendbuf: /* XDR encoding and RPC/RDMA marshaling of this request has not * yet occurred. Thus a lower bound is needed to prevent buffer |
