Problem: After a few days uptime my Pi sees hundreds of MB gobbled up by the irqbalance daemon (which balances interrupts across multiple CPUs). Package version is 1.0.6-3 on Debian jessie/armhf and its a known bug.
Fix: 0) Restart irqbalance in nightly cron job, or 1) Compile and install a newer, patched version (my choice).
Remove buggy irqbalance:
$ sudo systemctl stop irqbalance $ sudo apt-get --purge remove irqbalance
Install development tools on the Pi:
$ sudo apt-get install build-essential autogen automake libtool pkg-config checkinstall
Download source and unpack:
$ wget https://github.com/Irqbalance/irqbalance/archive/v1.0.9.tar.gz && tar xvzf v1.0.9.tar.gz
Checkinstall is an easy way to make Debian packages for personal use. Compile and (check)install:
$ cd irqbalance-1.0.9 $ /autogen.sh $ ./configure $ make $ sudo checkinstall make install
Start new irqbalance:
$ sudo /usr/local/sbin/irqbalance &
Optional: Configure the daemon for systemd control and auto-start at boot.
I have been running the daemon for a few days now and it stays around 0.6% memory usage vs 20% (and growing) of the previous packaged version.