From: Hangbin Liu <liuhangbin@xxxxxxxxx>
Fix sync_threshold description which should have two values. Also add
sync_refresh_period and sync_retries based on commit 749c42b620a9
("ipvs: reduce sync rate with time thresholds").
Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
Documentation/networking/ipvs-sysctl.txt | 40 +++++++++++++++++++++++++-------
1 file changed, 31 insertions(+), 9 deletions(-)
diff --git a/Documentation/networking/ipvs-sysctl.txt b/Documentation/networking/ipvs-sysctl.txt
index e6b1c025fdd8..7acaaa65451e 100644
--- a/Documentation/networking/ipvs-sysctl.txt
+++ b/Documentation/networking/ipvs-sysctl.txt
@@ -185,15 +185,37 @@ secure_tcp - INTEGER
The value definition is the same as that of drop_entry and
drop_packet.
-sync_threshold - INTEGER
- default 3
-
- It sets synchronization threshold, which is the minimum number
- of incoming packets that a connection needs to receive before
- the connection will be synchronized. A connection will be
- synchronized, every time the number of its incoming packets
- modulus 50 equals the threshold. The range of the threshold is
- from 0 to 49.
+sync_threshold - vector of 2 INTEGERs: sync_threshold, sync_period
+ default 3 50
+
+ It sets synchronization threshold, which is the minimum number
+ of incoming packets that a connection needs to receive before
+ the connection will be synchronized. A connection will be
+ synchronized, every time the number of its incoming packets
+ modulus sync_period equals the threshold. The range of the
+ threshold is from 0 to sync_period.
+
+ When sync_period and sync_refresh_period are 0, send sync only
+ for state changes or only once when pkts matches sync_threshold
+
+sync_refresh_period - UNSIGNED INTEGER
+ default 0
+
+ In seconds, difference in reported connection timer that triggers
+ new sync message. It can be used to avoid sync messages for the
+ specified period (or half of the connection timeout if it is lower)
+ if connection state is not changed since last sync.
+
+ This is useful for normal connections with high traffic to reduce
+ sync rate. Additionally, retry sync_retries times with period of
+ sync_refresh_period/8.
+
+sync_retries - INTEGER
+ default 0
+
+ Defines sync retries with period of sync_refresh_period/8. Useful
+ to protect against loss of sync messages. The range of the
+ sync_retries is from 0 to 3.
snat_reroute - BOOLEAN
0 - disabled
--
2.1.4
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