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List:       linux-nfs
Subject:    [PATCH v2 1/4] xprtrdma: Put Send CQ in IB_POLL_WORKQUEUE mode
From:       Chuck Lever <chuck.lever () oracle ! com>
Date:       2017-10-30 20:21:49
Message-ID: 20171030202149.8146.58899.stgit () manet ! 1015granger ! net
[Download RAW message or body]

Lift the Send and LocalInv completion handlers out of soft IRQ mode
to make room for other work. Also, move the Send CQ to a different
CPU than the CPU where the Receive CQ is running, for improved
scalability.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Devesh Sharma <devesh.sharma@broadcom.com>
---
 net/sunrpc/xprtrdma/verbs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 22128a8..4cfa893 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -558,7 +558,7 @@
 
 	sendcq = ib_alloc_cq(ia->ri_device, NULL,
 			     ep->rep_attr.cap.max_send_wr + 1,
-			     0, IB_POLL_SOFTIRQ);
+			     1, IB_POLL_WORKQUEUE);
 	if (IS_ERR(sendcq)) {
 		rc = PTR_ERR(sendcq);
 		dprintk("RPC:       %s: failed to create send CQ: %i\n",

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