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From: Trond Myklebust <trondmy@gmail.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH v3 24/44] SUNRPC: Simplify xprt_prepare_transmit()
Date: Mon, 17 Sep 2018 09:03:15 -0400	[thread overview]
Message-ID: <20180917130335.112832-25-trond.myklebust@hammerspace.com> (raw)
In-Reply-To: <20180917130335.112832-24-trond.myklebust@hammerspace.com>

Remove the checks for whether or not we need to transmit, and whether
or not a reply has been received. Those are already handled in
call_transmit() itself.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 net/sunrpc/xprt.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 3b31830ef851..385ee9f64353 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1122,27 +1122,18 @@ bool xprt_prepare_transmit(struct rpc_task *task)
 {
 	struct rpc_rqst	*req = task->tk_rqstp;
 	struct rpc_xprt	*xprt = req->rq_xprt;
-	bool ret = false;
 
 	dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid);
 
-	spin_lock_bh(&xprt->transport_lock);
-	if (!req->rq_bytes_sent) {
-		if (req->rq_reply_bytes_recvd) {
-			task->tk_status = req->rq_reply_bytes_recvd;
-			goto out_unlock;
-		}
+	if (!xprt_lock_write(xprt, task)) {
+		/* Race breaker: someone may have transmitted us */
 		if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate))
-			goto out_unlock;
-	}
-	if (!xprt->ops->reserve_xprt(xprt, task)) {
-		task->tk_status = -EAGAIN;
-		goto out_unlock;
+			rpc_wake_up_queued_task_set_status(&xprt->sending,
+					task, 0);
+		return false;
+
 	}
-	ret = true;
-out_unlock:
-	spin_unlock_bh(&xprt->transport_lock);
-	return ret;
+	return true;
 }
 
 void xprt_end_transmit(struct rpc_task *task)
-- 
2.17.1

  reply	other threads:[~2018-09-17 18:31 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-17 13:02 [PATCH v3 00/44] Convert RPC client transmission to a queued model Trond Myklebust
2018-09-17 13:02 ` [PATCH v3 01/44] SUNRPC: Clean up initialisation of the struct rpc_rqst Trond Myklebust
2018-09-17 13:02   ` [PATCH v3 02/44] SUNRPC: If there is no reply expected, bail early from call_decode Trond Myklebust
2018-09-17 13:02     ` [PATCH v3 03/44] SUNRPC: The transmitted message must lie in the RPCSEC window of validity Trond Myklebust
2018-09-17 13:02       ` [PATCH v3 04/44] SUNRPC: Simplify identification of when the message send/receive is complete Trond Myklebust
2018-09-17 13:02         ` [PATCH v3 05/44] SUNRPC: Avoid holding locks across the XDR encoding of the RPC message Trond Myklebust
2018-09-17 13:02           ` [PATCH v3 06/44] SUNRPC: Rename TCP receive-specific state variables Trond Myklebust
2018-09-17 13:02             ` [PATCH v3 07/44] SUNRPC: Move reset of TCP state variables into the reconnect code Trond Myklebust
2018-09-17 13:02               ` [PATCH v3 08/44] SUNRPC: Add socket transmit queue offset tracking Trond Myklebust
2018-09-17 13:03                 ` [PATCH v3 09/44] SUNRPC: Simplify dealing with aborted partially transmitted messages Trond Myklebust
2018-09-17 13:03                   ` [PATCH v3 10/44] SUNRPC: Refactor the transport request pinning Trond Myklebust
2018-09-17 13:03                     ` [PATCH v3 11/44] SUNRPC: Add a helper to wake up a sleeping rpc_task and set its status Trond Myklebust
2018-09-17 13:03                       ` [PATCH v3 12/44] SUNRPC: Test whether the task is queued before grabbing the queue spinlocks Trond Myklebust
2018-09-17 13:03                         ` [PATCH v3 13/44] SUNRPC: Don't wake queued RPC calls multiple times in xprt_transmit Trond Myklebust
2018-09-17 13:03                           ` [PATCH v3 14/44] SUNRPC: Rename xprt->recv_lock to xprt->queue_lock Trond Myklebust
2018-09-17 13:03                             ` [PATCH v3 15/44] SUNRPC: Refactor xprt_transmit() to remove the reply queue code Trond Myklebust
2018-09-17 13:03                               ` [PATCH v3 16/44] SUNRPC: Refactor xprt_transmit() to remove wait for reply code Trond Myklebust
2018-09-17 13:03                                 ` [PATCH v3 17/44] SUNRPC: Minor cleanup for call_transmit() Trond Myklebust
2018-09-17 13:03                                   ` [PATCH v3 18/44] SUNRPC: Distinguish between the slot allocation list and receive queue Trond Myklebust
2018-09-17 13:03                                     ` [PATCH v3 19/44] SUNRPC: Add a transmission queue for RPC requests Trond Myklebust
2018-09-17 13:03                                       ` [PATCH v3 20/44] SUNRPC: Refactor RPC call encoding Trond Myklebust
2018-09-17 13:03                                         ` [PATCH v3 21/44] SUNRPC: Fix up the back channel transmit Trond Myklebust
2018-09-17 13:03                                           ` [PATCH v3 22/44] SUNRPC: Treat the task and request as separate in the xprt_ops->send_request() Trond Myklebust
2018-09-17 13:03                                             ` [PATCH v3 23/44] SUNRPC: Don't reset the request 'bytes_sent' counter when releasing XPRT_LOCK Trond Myklebust
2018-09-17 13:03                                               ` Trond Myklebust [this message]
2018-09-17 13:03                                                 ` [PATCH v3 25/44] SUNRPC: Move RPC retransmission stat counter to xprt_transmit() Trond Myklebust
2018-09-17 13:03                                                   ` [PATCH v3 26/44] SUNRPC: Improve latency for interactive tasks Trond Myklebust
2018-09-17 13:03                                                     ` [PATCH v3 27/44] SUNRPC: Support for congestion control when queuing is enabled Trond Myklebust
2018-09-17 13:03                                                       ` [PATCH v3 28/44] SUNRPC: Enqueue swapper tagged RPCs at the head of the transmit queue Trond Myklebust
2018-09-17 13:03                                                         ` [PATCH v3 29/44] SUNRPC: Allow calls to xprt_transmit() to drain the entire " Trond Myklebust
2018-09-17 13:03                                                           ` [PATCH v3 30/44] SUNRPC: Allow soft RPC calls to time out when waiting for the XPRT_LOCK Trond Myklebust
2018-09-17 13:03                                                             ` [PATCH v3 31/44] SUNRPC: Turn off throttling of RPC slots for TCP sockets Trond Myklebust
2018-09-17 13:03                                                               ` [PATCH v3 32/44] SUNRPC: Clean up transport write space handling Trond Myklebust
2018-09-17 13:03                                                                 ` [PATCH v3 33/44] SUNRPC: Cleanup: remove the unused 'task' argument from the request_send() Trond Myklebust
2018-09-17 13:03                                                                   ` [PATCH v3 34/44] SUNRPC: Don't take transport->lock unnecessarily when taking XPRT_LOCK Trond Myklebust
2018-09-17 13:03                                                                     ` [PATCH v3 35/44] SUNRPC: Convert xprt receive queue to use an rbtree Trond Myklebust
2018-09-17 13:03                                                                       ` [PATCH v3 36/44] SUNRPC: Fix priority queue fairness Trond Myklebust
2018-09-17 13:03                                                                         ` [PATCH v3 37/44] SUNRPC: Convert the xprt->sending queue back to an ordinary wait queue Trond Myklebust
2018-09-17 13:03                                                                           ` [PATCH v3 38/44] SUNRPC: Add a label for RPC calls that require allocation on receive Trond Myklebust
2018-09-17 13:03                                                                             ` [PATCH v3 39/44] SUNRPC: Add a bvec array to struct xdr_buf for use with iovec_iter() Trond Myklebust
2018-09-17 13:03                                                                               ` [PATCH v3 40/44] SUNRPC: Simplify TCP receive code by switching to using iterators Trond Myklebust
2018-09-17 13:03                                                                                 ` [PATCH v3 41/44] SUNRPC: Clean up - rename xs_tcp_data_receive() to xs_stream_data_receive() Trond Myklebust
2018-09-17 13:03                                                                                   ` [PATCH v3 42/44] SUNRPC: Allow AF_LOCAL sockets to use the generic stream receive Trond Myklebust
2018-09-17 13:03                                                                                     ` [PATCH v3 43/44] SUNRPC: Clean up xs_udp_data_receive() Trond Myklebust
2018-09-17 13:03                                                                                       ` [PATCH v3 44/44] SUNRPC: Unexport xdr_partial_copy_from_skb() Trond Myklebust
2018-09-17 20:44                                                                                 ` [PATCH v3 40/44] SUNRPC: Simplify TCP receive code by switching to using iterators Trond Myklebust
2018-11-09 11:19                                                                                 ` Catalin Marinas
2018-11-29 19:28                                                                                   ` Cristian Marussi
2018-11-29 19:56                                                                                     ` Trond Myklebust
2018-11-30 16:19                                                                                       ` Cristian Marussi
2018-11-30 19:31                                                                                         ` Trond Myklebust
2018-12-02 16:44                                                                                           ` Trond Myklebust
2018-12-03 11:45                                                                                             ` Catalin Marinas
2018-12-03 11:53                                                                                               ` Cristian Marussi
2018-12-03 18:54                                                                                                 ` Cristian Marussi
2018-12-27 19:21                                                     ` [PATCH v3 26/44] SUNRPC: Improve latency for interactive tasks Chuck Lever
2018-12-27 22:14                                                       ` Trond Myklebust
2018-12-27 22:34                                                         ` Chuck Lever
2018-12-31 18:09                                                           ` Trond Myklebust
2018-12-31 18:44                                                             ` Chuck Lever
2018-12-31 18:59                                                               ` Trond Myklebust
2018-12-31 19:09                                                                 ` Chuck Lever
2018-12-31 19:18                                                                   ` Trond Myklebust
2018-12-31 19:21                                                                     ` Trond Myklebust
2019-01-02 18:17                                                                       ` Chuck Lever
2019-01-02 18:45                                                                         ` Trond Myklebust
2019-01-02 18:51                                                                           ` Chuck Lever
2019-01-02 18:57                                                                             ` Trond Myklebust
2019-01-02 19:06                                                                               ` Trond Myklebust
2019-01-02 19:24                                                                                 ` Trond Myklebust
2019-01-02 19:33                                                                                   ` Chuck Lever
2019-01-02 19:08                                                                               ` Chuck Lever
2019-01-02 19:11                                                                                 ` Trond Myklebust
2018-09-18 21:01                               ` [PATCH v3 15/44] SUNRPC: Refactor xprt_transmit() to remove the reply queue code Anna Schumaker
2018-09-19 15:48                                 ` Trond Myklebust
2018-09-19 17:30                                   ` Anna Schumaker

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