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-rw-r--r--Documentation/networking/smc-sysctl.rst18
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst
index 45ba1522e189..6d8acdbe9be1 100644
--- a/Documentation/networking/smc-sysctl.rst
+++ b/Documentation/networking/smc-sysctl.rst
@@ -41,3 +41,21 @@ smcr_testlink_time - INTEGER
disabling TEST_LINK.
Default: 30 seconds.
+
+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
+
+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