- Note that so-reuseport at extreme load is better turned off,

otherwise queries are not distributed evenly, on Linux 4.4.x.
NLnetLabs · May 20, 2019 · 1c3ba0c · 1c3ba0c
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diff --git a/doc/Changelog b/doc/Changelog
@@ -1,3 +1,7 @@
+20 May 2019: Wouter
+	- Note that so-reuseport at extreme load is better turned off,
+	  otherwise queries are not distributed evenly, on Linux 4.4.x.
+
 16 May 2019: Wouter
 	- Fix #31: swig 4.0 and python module.
 

diff --git a/doc/example.conf.in b/doc/example.conf.in
@@ -103,6 +103,7 @@ server:
 	# so-sndbuf: 0
 
 	# use SO_REUSEPORT to distribute queries over threads.
+	# at extreme load it could be better to turn it off to distribute even.
 	# so-reuseport: yes
 
 	# use IP_TRANSPARENT so the interface: addresses can be non-local

diff --git a/doc/unbound.conf.5.in b/doc/unbound.conf.5.in
@@ -300,6 +300,8 @@ it may also work.  You can enable it (on any platform and kernel),
 it then attempts to open the port and passes the option if it was available
 at compile time, if that works it is used, if it fails, it continues
 silently (unless verbosity 3) without the option.
+At extreme load it could be better to turn it off to distribute the queries
+evenly, reported for Linux systems (4.4.x).
 .TP
 .B ip\-transparent: \fI<yes or no>
 If yes, then use IP_TRANSPARENT socket option on sockets where unbound