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authorHangbin Liu <liuhangbin@gmail.com>2017-02-20 11:31:35 +0300
committerSimon Horman <horms@verge.net.au>2017-03-16 15:33:39 +0300
commita2f346d82bcab1927a199f475dc299c00413ec39 (patch)
tree0cf1dd4866cec84f6d580b67a0ace9d280bbcabc /Documentation/networking/ipvs-sysctl.txt
parent864e91ca981ea1d18f05a8f5063520d103373266 (diff)
downloadlinux-a2f346d82bcab1927a199f475dc299c00413ec39.tar.xz
ipvs: fix sync_threshold description and add sync_refresh_period, sync_retries
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@gmail.com> Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'Documentation/networking/ipvs-sysctl.txt')
-rw-r--r--Documentation/networking/ipvs-sysctl.txt40
1 files 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