netdev - [PATCH net] tcp: fix tcp

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Message-Id: <20210210171333.81355-1-eric.dumazet@gmail.com>
Date:   Wed, 10 Feb 2021 09:13:33 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Zhibin Liu <zhibinliu@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>
Subject: [PATCH net] tcp: fix tcp_rmem documentation

From: Eric Dumazet <edumazet@...gle.com>

tcp_rmem[1] has been changed to 131072, we should update the documentation
to reflect this.

Fixes: a337531b942b ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Reported-by: Zhibin Liu <zhibinliu@...gle.com>
Cc: Yuchung Cheng <ycheng@...gle.com>
---
 Documentation/networking/ip-sysctl.rst | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 83ff5158005af523f7b7464313a1c7f1f3b3ae05..0b9f19f1b6b5c4985201ede4661b644ec1ef98d7 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -651,16 +651,15 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max
 
 	default: initial size of receive buffer used by TCP sockets.
 	This value overrides net.core.rmem_default used by other protocols.
-	Default: 87380 bytes. This value results in window of 65535 with
-	default setting of tcp_adv_win_scale and tcp_app_win:0 and a bit
-	less for default tcp_app_win. See below about these variables.
+	Default: 131072 bytes.
+	This value results in initial window of 65535.
 
 	max: maximal size of receive buffer allowed for automatically
 	selected receiver buffers for TCP socket. This value does not override
 	net.core.rmem_max.  Calling setsockopt() with SO_RCVBUF disables
 	automatic tuning of that socket's receive buffer size, in which
 	case this value is ignored.
-	Default: between 87380B and 6MB, depending on RAM size.
+	Default: between 131072 and 6MB, depending on RAM size.
 
 tcp_sack - BOOLEAN
 	Enable select acknowledgments (SACKS).
-- 
2.30.0.478.g8a0d178c01-goog