ipvs: Document sysctl sync_ports

Document sysctl sync_ports based on commit f73181c8288f ("ipvs: add support
for sync threads").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

diff --git a/Documentation/networking/ipvs-sysctl.txt b/Documentation/networking/ipvs-sysctl.txt
index 159d70b6dff3dcd6761dada9af312af6a12415f1..a6feecd467cd45f85560cb7e0e1c56f3cccb53fb 100644 (file)
--- a/Documentation/networking/ipvs-sysctl.txt
+++ b/Documentation/networking/ipvs-sysctl.txt
@@ -231,6 +231,14 @@ sync_sock_size - INTEGER
        Configuration of SNDBUF (master) or RCVBUF (slave) socket limit.
        Default value is 0 (preserve system defaults).
 
+sync_ports - INTEGER
+       default 1
+
+       The number of threads that master and backup servers can use for
+       sync traffic. Every thread will use single UDP port, thread 0 will
+       use the default port 8848 while last thread will use port
+       8848+sync_ports-1.
+
 snat_reroute - BOOLEAN
        0 - disabled
        not 0 - enabled (default)