tcp: restrict net.ipv4.tcp_adv_win_scale (#20312)

[cascardo/linux.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index c7165f4..3c5e465 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -20,6 +20,15 @@ ip_no_pmtu_disc - BOOLEAN
 min_pmtu - INTEGER
        default 562 - minimum discovered Path MTU
 
+route/max_size - INTEGER
+       Maximum number of routes allowed in the kernel.  Increase
+       this when using large numbers of interfaces and/or routes.
+
+neigh/default/gc_thresh3 - INTEGER
+       Maximum number of neighbor entries allowed.  Increase this
+       when using large numbers of interfaces and when communicating
+       with large numbers of directly-connected peers.
+
 mtu_expires - INTEGER
        Time, in seconds, that cached PMTU information is kept.
 
@@ -135,6 +144,7 @@ tcp_adv_win_scale - INTEGER
        Count buffering overhead as bytes/2^tcp_adv_win_scale
        (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
        if it is <= 0.
+       Possible values are [-31, 31], inclusive.
        Default: 2
 
 tcp_allowed_congestion_control - STRING