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tcp: fix tcp_rmem documentation

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

Fixes: a337531b94 ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Zhibin Liu <zhibinliu@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2021-02-10 09:13:33 -08:00 committed by David S. Miller
parent f1d77b2efb
commit 1d1be91254
1 changed files with 3 additions and 4 deletions
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7
Documentation/networking/ip-sysctl.rst
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@ -630,16 +630,15 @@ 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).