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| author | Paolo Abeni <[email protected]> | 2025-02-11 12:08:02 +0000 |
|---|---|---|
| committer | Paolo Abeni <[email protected]> | 2025-02-11 12:08:02 +0000 |
| commit | ae9b3c0e79bcc154f80f6e862d3085de31bcb3ce (patch) | |
| tree | a30101f515f68abb751a449a79570c0458059f11 /net/ipv4/sysctl_net_ipv4.c | |
| parent | Merge branch 'mptcp-pm-misc-cleanups-part-2' (diff) | |
| parent | tcp: add tcp_rto_max_ms sysctl (diff) | |
| download | kernel-ae9b3c0e79bcc154f80f6e862d3085de31bcb3ce.tar.gz kernel-ae9b3c0e79bcc154f80f6e862d3085de31bcb3ce.zip | |
Merge branch 'tcp-allow-to-reduce-max-rto'
Eric Dumazet says:
====================
tcp: allow to reduce max RTO
This is a followup of a discussion started 6 months ago
by Jason Xing.
Some applications want to lower the time between each
retransmit attempts.
TCP_KEEPINTVL and TCP_KEEPCNT socket options don't
work around the issue.
This series adds:
- a new TCP level socket option (TCP_RTO_MAX_MS)
- a new sysctl (/proc/sys/net/ipv4/tcp_rto_max_ms)
Admins and/or applications can now change the max rto value
at their own risk.
Link: https://lore.kernel.org/netdev/[email protected]/T/
====================
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 42cb5dc9cb24..3a43010d726f 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -28,6 +28,7 @@ static int tcp_adv_win_scale_max = 31; static int tcp_app_win_max = 31; static int tcp_min_snd_mss_min = TCP_MIN_SND_MSS; static int tcp_min_snd_mss_max = 65535; +static int tcp_rto_max_max = TCP_RTO_MAX_SEC * MSEC_PER_SEC; static int ip_privileged_port_min; static int ip_privileged_port_max = 65535; static int ip_ttl_min = 1; @@ -1583,6 +1584,15 @@ static struct ctl_table ipv4_net_table[] = { .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ONE, }, + { + .procname = "tcp_rto_max_ms", + .data = &init_net.ipv4.sysctl_tcp_rto_max_ms, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ONE_THOUSAND, + .extra2 = &tcp_rto_max_max, + }, }; static __net_init int ipv4_sysctl_init_net(struct net *net) |