I found these messages in my Ubuntu 14.04 server filling the syslog:
Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 121 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 122 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 123 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 124 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 125 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 126 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 133 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 134 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 135 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 136 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 137 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 138 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 146 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 147 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 148 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 149 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 150 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 151 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 158 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 159 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 160 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 161 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 162 affinity_hint subset empty Jul 4 14:49:14 h80-stack01 /usr/sbin/irqbalance: irq 163 affinity_hint subset empty
Seems to be a bug reported in Ubuntu, to avoid it, I followed these steps:
Edit file /etc/init/irqbalance.conf and change the line
exec /usr/sbin/irqbalance $DOPTIONS
for
exec /usr/sbin/irqbalance $OPTIONS $DOPTIONS
Edit /etc/default/irqbalance and add this line:
OPTIONS="--hintpolicy=ignore"
The file should look like this:
#Configuration for the irqbalance daemon #Should irqbalance be enabled? ENABLED="1" #Balance the IRQs only once? ONESHOT="0" OPTIONS="--hintpolicy=ignore"
Finally restart irqbalance service:
$ sudo service irqbalance restart
If the service restart does not work try rebooting machine.