conntrackd: change scheduler and priority via configuration file

With this patch, you can change the scheduler policy and priority
for conntrackd. Using a RT scheduler policy reduces the chances to
hit ENOBUFS in Netlink.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/doc/sync/alarm/conntrackd.conf b/doc/sync/alarm/conntrackd.conf
index ca6e661..793e953 100644
--- a/doc/sync/alarm/conntrackd.conf
+++ b/doc/sync/alarm/conntrackd.conf
@@ -197,6 +197,17 @@ General {
 	Nice -20
 
 	#
+	# Select a different scheduler for the daemon, you can select between
+	# RR and FIFO and the process priority (minimum is 0, maximum is 99).
+	# See man sched_setscheduler(2) for more information. Using a RT
+	# scheduler reduces the chances to overrun the Netlink buffer.
+	#
+	# Scheduler {
+	#	Type FIFO
+	#	Priority 99
+	# }
+
+	#
 	# Number of buckets in the cache hashtable. The bigger it is,
 	# the closer it gets to O(1) at the cost of consuming more memory.
 	# Read some documents about tuning hashtables for further reference.