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Each datagram is received by a random thread and dispatch to its destination thread linked to the connection. Then, the datagram is handled by the connection thread. Once this is done, datagram buffer pointer is atomically set to NULL to mark it as consumed. Consumed datagrams are purged before recvfrom() invocation on random receiver threads. The check for NULL buffer must thus be done atomically. This was not the case before this patch, which may have triggered race conditions. This bug has been introduced by commit 91b2305ad79bb7086840797b6e98bd791992444f MINOR: quic: implement datagram cleanup for quic_receiver_buf This should be backported up to 2.6 after previously mentionned commit.
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)