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From: Mahanta Jambigi <mjambigi@linux.ibm.com>
To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com, alibuda@linux.alibaba.com,
	dust.li@linux.alibaba.com, sidraya@linux.ibm.com,
	wenjia@linux.ibm.com
Cc: pasic@linux.ibm.com, horms@kernel.org, tonylu@linux.alibaba.com,
	guwen@linux.alibaba.com, netdev@vger.kernel.org,
	linux-s390@vger.kernel.org,
	Mahanta Jambigi <mjambigi@linux.ibm.com>
Subject: [PATCH net-next] Documentation: net/smc: correct old value of smcr_max_recv_wr
Date: Wed, 22 Apr 2026 10:51:58 +0200	[thread overview]
Message-ID: <20260422085159.459678-1-mjambigi@linux.ibm.com> (raw)

The smc-sysctl.rst documentation incorrectly stated that the previous
hardcoded maximum number of WR buffers on the receive path (smcr_max_recv_wr)
was 16. The correct historical value used before the introduction of the sysctl
control was 48. Update the documentation to reflect the accurate default value.

Fixes: aef3cdb47bbb net/smc: make wr buffer count configurable
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Sidraya Jayagond <sidraya@linux.ibm.com>
Signed-off-by: Mahanta Jambigi <mjambigi@linux.ibm.com>
---
 Documentation/networking/smc-sysctl.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst
index 904a910f198e..279d15e61899 100644
--- a/Documentation/networking/smc-sysctl.rst
+++ b/Documentation/networking/smc-sysctl.rst
@@ -100,14 +100,14 @@ smcr_max_recv_wr - INTEGER
 	depending on the workload it can be a bottleneck in a sense that threads
 	have to wait for work request buffers to become available. Before the
 	introduction of this control the maximal number of work request buffers
-	available on the receive path used to be hard coded to 16. With this control
+	available on the receive path used to be hard coded to 48. With this control
 	it becomes configurable. The acceptable range is between 2 and 2048.
 
 	Please be aware that all the buffers need to be allocated as a physically
 	continuous array in which each element is a single buffer and has the size
 	of SMC_WR_BUF_SIZE (48) bytes. If the allocation fails, we keep retrying
 	with half of the buffer count until it is ether successful or (unlikely)
-	we dip below the old hard coded value which is 16 where we give up much
+	we dip below the old hard coded value which is 48 where we give up much
 	like before having this control.
 
 	Default: 48
-- 
2.51.0


                 reply	other threads:[~2026-04-22  8:52 UTC|newest]

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