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Historically this function would try to wake the most accurate number of process_stream() waiters. But since the introduction of filters which could also require buffers (e.g. for compression), things started not to be as accurate anymore. Nowadays muxes and transport layers also use buffers, so the runqueue size has nothing to do anymore with the number of supposed users to come. In addition to this, the threshold was compared to the number of free buffer calculated as allocated minus used, but this didn't work anymore with local pools since these counts are not updated upon alloc/free! Let's clean this up and pass the number of released buffers instead, and consider that each waiter successfully called counts as one buffer. This is not rocket science and will not suddenly fix everything, but at least it cannot be as wrong as it is today. This could have been marked as a bug given that the current situation is totally broken regarding this, but this probably doesn't completely fix it, it only goes in a better direction. It is possible however that it makes sense in the future to backport this as part of a larger series if the situation significantly improves.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)