[PATCH 3/5] ipvs: Document sysctl sync_qlen_max and sync_sock_size

To: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Subject: [PATCH 3/5] ipvs: Document sysctl sync_qlen_max and sync_sock_size
Cc: lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, netfilter-devel@xxxxxxxxxxxxxxx, Wensong Zhang <wensong@xxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>, Hangbin Liu <liuhangbin@xxxxxxxxx>, Simon Horman <horms@xxxxxxxxxxxx>
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Thu, 16 Mar 2017 13:43:13 +0100
From: Hangbin Liu <liuhangbin@xxxxxxxxx>

Document sysctl sync_qlen_max and sync_sock_size based on
commit 1c003b1580e2 ("ipvs: wakeup master thread").

Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
 Documentation/networking/ipvs-sysctl.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/networking/ipvs-sysctl.txt 
index 7acaaa65451e..159d70b6dff3 100644
--- a/Documentation/networking/ipvs-sysctl.txt
+++ b/Documentation/networking/ipvs-sysctl.txt
@@ -217,6 +217,20 @@ sync_retries - INTEGER
        to protect against loss of sync messages. The range of the
        sync_retries is from 0 to 3.
+sync_qlen_max - UNSIGNED LONG
+       Hard limit for queued sync messages that are not sent yet. It
+       defaults to 1/32 of the memory pages but actually represents
+       number of messages. It will protect us from allocating large
+       parts of memory when the sending rate is lower than the queuing
+       rate.
+sync_sock_size - INTEGER
+       default 0
+       Configuration of SNDBUF (master) or RCVBUF (slave) socket limit.
+       Default value is 0 (preserve system defaults).
 snat_reroute - BOOLEAN
        0 - disabled
        not 0 - enabled (default)

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