SO_REUSEPORT and Unix domain sockets

From: Tobias Oberstein
Date: Tue May 27 2014 - 05:55:28 EST


Linux kernels >= 3.9 allow sharing of sockets between processes with in-kernel load-balancing by setting SO_REUSEPORT (eg http://lwn.net/Articles/542629/)

How can this be used for sockets of type AF_UNIX?

I can only get it working with TCP sockets, not Unix domain sockets.

When using TCP, the incoming clients will get nicely balanced to all processes listening. With Unix domain sockets, the incoming clients all get connected only to the last started process.

The test code (Python) I was trying is here:

http://stackoverflow.com/questions/23742368/can-so-reuseport-be-used-on-unix-domain-sockets

Any hints appreciated,
/Tobias
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