From a1602d749097386ec9e8e411a16a9c37ff6cd5fc Mon Sep 17 00:00:00 2001
From: Gerd Bayer <gbayer@linux.ibm.com>
Date: Mon, 30 Oct 2023 18:03:43 +0100
Subject: [PATCH] net/smc: fix documentation of buffer sizes
Since commit 833bac7ec392 ("net/smc: Fix setsockopt and sysctl to
specify same buffer size again") the SMC protocol uses its own
default values for the smc.rmem and smc.wmem sysctl variables
which are no longer derived from the TCP IPv4 buffer sizes.
Fixup the kernel documentation to reflect this change, too.
Fixes: 833bac7ec392 ("net/smc: Fix setsockopt and sysctl to specify same buffer size again")
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Link: https://lore.kernel.org/r/20231030170343.748097-1-gbayer@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
Documentation/networking/smc-sysctl.rst | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst
index 6d8acdbe9be1d..769149d98773a 100644
--- a/Documentation/networking/smc-sysctl.rst
+++ b/Documentation/networking/smc-sysctl.rst
@@ -44,18 +44,16 @@ smcr_testlink_time - INTEGER
wmem - INTEGER
Initial size of send buffer used by SMC sockets.
- The default value inherits from net.ipv4.tcp_wmem[1].
The minimum value is 16KiB and there is no hard limit for max value, but
only allowed 512KiB for SMC-R and 1MiB for SMC-D.
- Default: 16K
+ Default: 64KiB
rmem - INTEGER
Initial size of receive buffer (RMB) used by SMC sockets.
- The default value inherits from net.ipv4.tcp_rmem[1].
The minimum value is 16KiB and there is no hard limit for max value, but
only allowed 512KiB for SMC-R and 1MiB for SMC-D.
- Default: 128K
+ Default: 64KiB
--
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