Hey other ops! Im having a serious problem with my neutron router getting spin locked in nf_conntrack_tuple_taken. Has anybody else experienced it? As the incoming request rate goes up, so nf_conntrack_tuple_taken runs very hot on CPU0 causing ksoftirqd/0 to run at 100%. At that point internal pings on the GRE network go sky high and its game over. Ubuntu 14.04/Icehouse 2014.1.1 on an ibm x3550 with 4 10G intel nics. eth0 - Mgt eth1 - GRE eth2 - Public eth3 - unused Any help very much appreciated! BR, Stuart -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20140815/91bf033f/attachment.html>