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Commit 7b8eb821 authored by Eric Dumazet's avatar Eric Dumazet Committed by Lee Jones
Browse files

UPSTREAM: tcp: fix tcp_rmem documentation 



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

Bug: 254441685
Fixes: a337531b942b ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarZhibin Liu <zhibinliu@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
(cherry picked from commit 1d1be91254bbdd189796041561fd430f7553bb88)
Signed-off-by: default avatarLee Jones <joneslee@google.com>
Change-Id: I2b02ff98d7a2bf715f60b3e5116a9327b06ac5a7
parent 99b0248d

Documentation/networking/ip-sysctl.txt

+3 −4
Original line number Diff line number Diff line
@@ -529,16 +529,15 @@ 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).