diff options
| author | Michael Tuexen <tuexen@FreeBSD.org> | 2025-10-15 20:19:14 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2025-10-19 23:50:30 +0000 |
| commit | a4198ef496779a12f183e1fb110ab31e76cfee4d (patch) | |
| tree | bccf5abd2262ed83950c714e95974752ba008fc2 | |
| parent | 0798de75ab5f79c8cc082a08dc79cb8b318b02dd (diff) | |
tcp: bump max snd buffer size for autoscaling
This allows in higher throughput values with default settings.
In the review I was proposing using 16 MB, but in the transport
call today we settled on a more conservative value of 8.
Bumping it further will be done in combination with mitigations
for mbuf exhaustion attacks.
Approved by: re (cperciva)
Reviewed by: rscheff, cc, glebius, Nick Banks, Peter Lei, jtl, thj, rrs
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D52872
(cherry picked from commit 9dd4742ee51ae80639b087a60ce7d15811c2b1e6)
(cherry picked from commit 7d29554b36ebdedf24e4605e5681b95abed5acd6)
| -rw-r--r-- | sys/netinet/tcp_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c index 2dfb7faf56e3..208f72c4661c 100644 --- a/sys/netinet/tcp_output.c +++ b/sys/netinet/tcp_output.c @@ -123,7 +123,7 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, sendbuf_inc, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_autosndbuf_inc), 0, "Incrementor step size of automatic send buffer"); -VNET_DEFINE(int, tcp_autosndbuf_max) = 2*1024*1024; +VNET_DEFINE(int, tcp_autosndbuf_max) = 8*1024*1024; SYSCTL_INT(_net_inet_tcp, OID_AUTO, sendbuf_max, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_autosndbuf_max), 0, "Max size of automatic send buffer"); |