| From 1d1be91254bbdd189796041561fd430f7553bb88 Mon Sep 17 00:00:00 2001 |
| From: Eric Dumazet <edumazet@google.com> |
| Date: Wed, 10 Feb 2021 09:13:33 -0800 |
| Subject: tcp: fix tcp_rmem documentation |
| |
| From: Eric Dumazet <edumazet@google.com> |
| |
| commit 1d1be91254bbdd189796041561fd430f7553bb88 upstream. |
| |
| 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@google.com> |
| Reported-by: Zhibin Liu <zhibinliu@google.com> |
| Cc: Yuchung Cheng <ycheng@google.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| Documentation/networking/ip-sysctl.rst | 7 +++---- |
| 1 file changed, 3 insertions(+), 4 deletions(-) |
| |
| --- a/Documentation/networking/ip-sysctl.rst |
| +++ b/Documentation/networking/ip-sysctl.rst |
| @@ -630,16 +630,15 @@ tcp_rmem - vector of 3 INTEGERs: min, de |
| |
| 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). |
