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From: Chuck Lever <chuck.lever@oracle.com>
To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org
Subject: [PATCH RFC 04/12] xprtrdma: Remove the RPCRDMA_REQ_F_PENDING flag
Date: Tue, 28 May 2019 14:21:11 -0400	[thread overview]
Message-ID: <20190528182111.19012.50313.stgit@manet.1015granger.net> (raw)
In-Reply-To: <20190528181018.19012.61210.stgit@manet.1015granger.net>

Commit 9590d083c1bb ("xprtrdma: Use xprt_pin_rqst in
rpcrdma_reply_handler") pins incoming RPC/RDMA replies so they
can be left in the pending requests queue while they are being
processed without introducing a race between ->buf_free and the
transport's reply handler. Therefore RPCRDMA_REQ_F_PENDING is no
longer necessary.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/sunrpc/xprtrdma/rpc_rdma.c  |    1 -
 net/sunrpc/xprtrdma/transport.c |    4 +---
 net/sunrpc/xprtrdma/xprt_rdma.h |    1 -
 3 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index d1f44f4..77fc1e4 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1371,7 +1371,6 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep)
 	}
 	req->rl_reply = rep;
 	rep->rr_rqst = rqst;
-	clear_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
 
 	trace_xprtrdma_reply(rqst->rq_task, rep, req, credits);
 	queue_work(buf->rb_completion_wq, &rep->rr_work);
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 1f73a6a..f84375d 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -618,8 +618,7 @@ static bool rpcrdma_check_regbuf(struct rpcrdma_xprt *r_xprt,
 	struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
 	struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
 
-	if (test_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags))
-		rpcrdma_release_rqst(r_xprt, req);
+	rpcrdma_release_rqst(r_xprt, req);
 	trace_xprtrdma_op_free(task, req);
 }
 
@@ -667,7 +666,6 @@ static bool rpcrdma_check_regbuf(struct rpcrdma_xprt *r_xprt,
 		goto drop_connection;
 	rqst->rq_xtime = ktime_get();
 
-	__set_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
 	if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req))
 		goto drop_connection;
 
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 2c6c5d8..3c39aa3 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -344,7 +344,6 @@ struct rpcrdma_req {
 
 /* rl_flags */
 enum {
-	RPCRDMA_REQ_F_PENDING = 0,
 	RPCRDMA_REQ_F_TX_RESOURCES,
 };
 


  parent reply	other threads:[~2019-05-28 18:21 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 18:20 [PATCH RFC 00/12] for-5.3 NFS/RDMA patches for review Chuck Lever
2019-05-28 18:20 ` [PATCH RFC 01/12] xprtrdma: Fix use-after-free in rpcrdma_post_recvs Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 02/12] xprtrdma: Replace use of xdr_stream_pos in rpcrdma_marshal_req Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 03/12] xprtrdma: Fix occasional transport deadlock Chuck Lever
2019-05-28 18:21 ` Chuck Lever [this message]
2019-05-28 18:21 ` [PATCH RFC 05/12] xprtrdma: Remove fr_state Chuck Lever
2019-05-30 14:05   ` Anna Schumaker
2019-05-31 13:36     ` Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 06/12] xprtrdma: Add mechanism to place MRs back on the free list Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 07/12] xprtrdma: Reduce context switching due to Local Invalidation Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 08/12] xprtrdma: Wake RPCs directly in rpcrdma_wc_send path Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 09/12] xprtrdma: Simplify rpcrdma_rep_create Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 10/12] xprtrdma: Streamline rpcrdma_post_recvs Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 11/12] xprtrdma: Refactor chunk encoding Chuck Lever
2019-05-28 18:21 ` [PATCH RFC 12/12] xprtrdma: Remove rpcrdma_req::rl_buffer Chuck Lever
2019-05-29  6:40 ` [PATCH RFC 00/12] for-5.3 NFS/RDMA patches for review Christoph Hellwig
2019-05-29 14:35   ` Chuck Lever
2019-05-31 14:32 ` Dennis Dalessandro
2019-05-31 14:34   ` Chuck Lever

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