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authorKevin Yang <yyd@google.com>2024-06-03 21:30:54 +0000
committerDavid S. Miller <davem@davemloft.net>2024-06-05 13:42:54 +0100
commitf086edef71be7174a16c1ed67ac65a085cda28b1 (patch)
tree3af89709786e212616a07d06b4c0a184efdfce49 /net/ipv4/tcp_ipv4.c
parent512bd0f9f926a05c724a9fd72bc4e14213845e01 (diff)
tcp: add sysctl_tcp_rto_min_us
Adding a sysctl knob to allow user to specify a default rto_min at socket init time, other than using the hard coded 200ms default rto_min. Note that the rto_min route option has the highest precedence for configuring this setting, followed by the TCP_BPF_RTO_MIN socket option, followed by the tcp_rto_min_us sysctl. Signed-off-by: Kevin Yang <yyd@google.com> Reviewed-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Yuchung Cheng <ycheng@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Tony Lu <tonylu@linux.alibaba.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3ef4b274c24b..3613e08ca794 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -3502,6 +3502,7 @@ static int __net_init tcp_sk_init(struct net *net)
net->ipv4.sysctl_tcp_shrink_window = 0;
net->ipv4.sysctl_tcp_pingpong_thresh = 1;
+ net->ipv4.sysctl_tcp_rto_min_us = jiffies_to_usecs(TCP_RTO_MIN);
return 0;
}