diff options
| author | JP Abgrall <jpa@google.com> | 2014-02-07 18:40:10 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:51:43 -0800 |
| commit | 72fc8653dc090a65c330ffd7bf3e7dda1271ffe0 (patch) | |
| tree | 2222b8229ed45dd5684bd560dc1f98ed2cf22704 /net/ipv4/tcp_output.c | |
| parent | 7c121720fa14889d59e933aad0a8b9ce948a39ae (diff) | |
tcp: add a sysctl to config the tcp_default_init_rwnd
The default initial rwnd is hardcoded to 10.
Now we allow it to be controlled via
/proc/sys/net/ipv4/tcp_default_init_rwnd
which limits the values from 3 to 100
This is somewhat needed because ipv6 routes are
autoconfigured by the kernel.
See "An Argument for Increasing TCP's Initial Congestion Window"
in https://developers.google.com/speed/articles/tcp_initcwnd_paper.pdf
Change-Id: I386b2a9d62de0ebe05c1ebe1b4bd91b314af5c54
Signed-off-by: JP Abgrall <jpa@google.com>
Conflicts:
net/ipv4/sysctl_net_ipv4.c
net/ipv4/tcp_input.c
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/tcp_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 9bfc39ff2285..9f069bd9de46 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -191,7 +191,7 @@ u32 tcp_default_init_rwnd(u32 mss) * (RFC 3517, Section 4, NextSeg() rule (2)). Further place a * limit when mss is larger than 1460. */ - u32 init_rwnd = TCP_INIT_CWND * 2; + u32 init_rwnd = sysctl_tcp_default_init_rwnd; if (mss > 1460) init_rwnd = max((1460 * init_rwnd) / mss, 2U); |