Documentation: fix udp_wmem_min in ip-sysctl.rst

UDP doesn't support tx memory accounting, and sysctl udp_wmem_min
is not really used anywhere. So we should fix the description in
ip-sysctl.rst accordingly.

Fixes: 1bca6d2e5d15 ("[UDP]: Add memory accounting.")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/c880a963d9b1fb5f442ae3c9e4dfa70d45296a16.1658167019.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index b3a534ed0e7c5fa1de2f847a67c8308f8b8342cd..66c72230eaade96599bbfff2914b98e9011a3df8 100644 (file)
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -1052,11 +1052,7 @@ udp_rmem_min - INTEGER
        Default: 4K
 
 udp_wmem_min - INTEGER
-       Minimal size of send buffer used by UDP sockets in moderation.
-       Each UDP socket is able to use the size for sending data, even if
-       total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
-
-       Default: 4K
+       UDP does not have tx memory accounting and this tunable has no effect.
 
 RAW variables
 =============