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Date:   Mon, 18 Jul 2022 13:54:56 -0400
From:   Xin Long <>
To:     network dev <>,
        Marcelo Ricardo Leitner <>
Subject: [PATCH net] Documentation: fix sctp_wmem in ip-sysctl.rst

Since commit 1033990ac5b2 ("sctp: implement memory accounting on tx path"),
SCTP has supported memory accounting on tx path where 'sctp_wmem' is used
by sk_wmem_schedule(). So we should fix the description for this option in
ip-sysctl.rst accordingly.

Fixes: 1033990ac5b2 ("sctp: implement memory accounting on tx path")
Signed-off-by: Xin Long <>
 Documentation/networking/ip-sysctl.rst | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 0e58001f8580..b7db2e5e5cc5 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -2870,7 +2870,14 @@ sctp_rmem - vector of 3 INTEGERs: min, default, max
 	Default: 4K
 sctp_wmem  - vector of 3 INTEGERs: min, default, max
-	Currently this tunable has no effect.
+	Only the first value ("min") is used, "default" and "max" are
+	ignored.
+	min: Minimal size of send buffer used by SCTP socket.
+	It is guaranteed to each SCTP socket (but not association) even
+	under moderate memory pressure.
+	Default: 4K
 addr_scope_policy - INTEGER
 	Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00

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