diff options
| author | Michael Tuexen <tuexen@FreeBSD.org> | 2025-10-15 20:24:51 +0000 |
|---|---|---|
| committer | Michael Tuexen <tuexen@FreeBSD.org> | 2025-10-15 20:24:51 +0000 |
| commit | baeff75122e5cdb669c920414e054224270383d7 (patch) | |
| tree | f32b44b5ff6f8719852a367f2289b8bc353fd8f8 | |
| parent | 9dd4742ee51ae80639b087a60ce7d15811c2b1e6 (diff) | |
tcp: bump max rcv 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.
Reviewed by: rscheff, Peter Lei, jtl, thj
MFC after: 3 days
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D52871
| -rw-r--r-- | sys/netinet/tcp_input.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index dd27ec77c1af..2146b0cac48f 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -219,7 +219,7 @@ SYSCTL_INT(_net_inet_tcp, OID_AUTO, recvbuf_auto, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_do_autorcvbuf), 0, "Enable automatic receive buffer sizing"); -VNET_DEFINE(int, tcp_autorcvbuf_max) = 2*1024*1024; +VNET_DEFINE(int, tcp_autorcvbuf_max) = 8*1024*1024; SYSCTL_INT(_net_inet_tcp, OID_AUTO, recvbuf_max, CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_autorcvbuf_max), 0, "Max size of automatic receive buffer"); |