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authorChuck Lever <chuck.lever@oracle.com>2019-02-11 11:25:41 -0500
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2019-02-14 11:58:44 -0500
commit2c94b8eca1a26cd46010d6e73a23da5f2e93a19d (patch)
treecd90799dc57ddabf330e8540ff939743292162c7 /net/sunrpc/clnt.c
parent35e77d21baa04b554bf3dc9a08dfa7e569286e51 (diff)
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 <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r--net/sunrpc/clnt.c7
1 files 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);