tcp: add tcp_rx_skb_cache sysctl

[mirror_ubuntu-hirsute-kernel.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 14fe93049d28e965d7349b03c5c8782c3d386e7d..288aa264ac26d98637a5bb1babc334bfc699bef1 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -772,6 +772,14 @@ tcp_challenge_ack_limit - INTEGER
        in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks)
        Default: 100
 
+tcp_rx_skb_cache - BOOLEAN
+       Controls a per TCP socket cache of one skb, that might help
+       performance of some workloads. This might be dangerous
+       on systems with a lot of TCP sockets, since it increases
+       memory usage.
+
+       Default: 0 (disabled)
+
 UDP variables:
 
 udp_l3mdev_accept - BOOLEAN