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The use of ~(1 << tid) to compute the sleeping_mask in tasklet_wakeup() will result in breakage above 32 threads, because (1<<31) = 0xFFFFFFFF8000000, and upper values will lead to theorically undefined results, but practically will wrap over 0x1 to 0x80000000 again and indicate wrong sleeping masks. It seems that the main visible effect maybe extra latency on some threads or short CPU loops on others. No backport is needed.
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)