Commit 435eba4a authored Aug 19, 2019 by Chuck Lever Committed by Anna Schumaker Aug 21, 2019

xprtrdma: Optimize rpcrdma_post_recvs()



Micro-optimization: In rpcrdma_post_recvs, since commit e340c2d6
("xprtrdma: Reduce the doorbell rate (Receive)"), the common case is
to return without doing anything. Found with perf.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

parent 1738de33

net/sunrpc/xprtrdma/verbs.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1465,7 +1465,7 @@ rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp)
		count = 0;

		needed = buf->rb_credits + (buf->rb_bc_srv_max_requests << 1);
		if (ep->rep_receive_count > needed)
		if (likely(ep->rep_receive_count > needed))
		goto out;
		needed -= ep->rep_receive_count;
		if (!temp)

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