[PATCHv2 net-next 3/4] ipvs: Document sysctl sync_ports

[Hangbin Liu <liuhangbin@xxxxxxxxx>]

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

Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
---
 Documentation/networking/ipvs-sysctl.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/networking/ipvs-sysctl.txt 
b/Documentation/networking/ipvs-sysctl.txt
index 159d70b..a6feecd 100644
--- 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)
-- 
2.5.5

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