On Sat, 2015-09-26 at 17:30 -0700, Tolga Ceylan wrote: > For applications using SO_REUSEPORT listeners, there is > no clean way to switch traffic on/off or add/remove > listeners without dropping pending connections. With this > patch, applications can turn off queueing of new connections > for a specific listener socket which enables implementation of > zero down time server applications. > > For example, a popular web server nginx handles application > configuration changes by forking new processes (listeners) > and waiting for old processes (listeners) to finish up their > processing. However, this approach is distruptive as removal > of a listener will drop pending connections for that listener. > Instead, with this patch, nginx can maintain two sets of listener > socket pools to be used by old/new processes and switch traffic off/on > using this socket option. Old processes set set this socket option > to drain their existing queues.
What about listen(fd, 0) ? Not sure we need to add a new socket option. It makes sense to extend reuseport logic to ignore listeners with a 0 backlog (if not already done, I did not check) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
