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The function processes packets sent by other threads in the current thread's queue. But if, for any reason, other threads write faster than the current one processes, this can lead to a situation where the function never returns. It seems that it might be what's happening in issue #1808, though unfortunately, this function is one of the rare without traces. But the amount of calls to functions like qc_lstnr_pkt_rcv() on a single thread seems to indicate this possibility. Thanks to Tristan for his efforts in collecting extremely precious traces! This likely needs to be backported to 2.6.
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)