From 2c94b8eca1a26cd46010d6e73a23da5f2e93a19d Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 11 Feb 2019 11:25:41 -0500 Subject: [PATCH] SUNRPC: Use au_rslack when computing reply buffer size au_rslack is significantly smaller than (au_cslack << 2). Using that value results in smaller receive buffers. In some cases this eliminates an extra segment in Reply chunks (RPC/RDMA). Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- net/sunrpc/clnt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 99bfeb17367c..241e8423fd0c 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1690,7 +1690,7 @@ call_refreshresult(struct rpc_task *task) static void call_allocate(struct rpc_task *task) { - unsigned int slack = task->tk_rqstp->rq_cred->cr_auth->au_cslack; + const struct rpc_auth *auth = task->tk_rqstp->rq_cred->cr_auth; struct rpc_rqst *req = task->tk_rqstp; struct rpc_xprt *xprt = req->rq_xprt; const struct rpc_procinfo *proc = task->tk_msg.rpc_proc; @@ -1715,9 +1715,10 @@ call_allocate(struct rpc_task *task) * and reply headers, and convert both values * to byte sizes. */ - req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen; + req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) + + proc->p_arglen; req->rq_callsize <<= 2; - req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen; + req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + proc->p_replen; req->rq_rcvsize <<= 2; status = xprt->ops->buf_alloc(task);