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25174d51ef
Implement a new function qc_set_tid_affinity(). This function is responsible to rebind a quic_conn instance to a new thread. This operation consists mostly of releasing existing tasks and tasklet and allocating new instances on the new thread. If the quic_conn uses its owned socket, it is also migrated to the new thread. The migration is finally completed with updated the CID TID to the new thread. After this step, the connection is thus accessible to the new thread and cannot be access anymore on the old one without risking race condition. To ensure rebinding is either done completely or not at all, tasks and tasklet are pre-allocated before all operations. If this fails, an error is returned and rebiding is not done. To destroy the older tasklet, its context is set to NULL before wake up. In I/O callbacks, a new function qc_process() is used to check context and free the tasklet if NULL. The thread rebinding can cause a race condition if the older thread quic_dghdlrs::dgrams list contains datagram for the connection after rebinding is done. To prevent this, quic_rx_pkt_retrieve_conn() always check if the packet CID is still associated to the current thread or not. In the latter case, no connection is returned and the new thread is returned to allow to redispatch the datagram to the new thread in a thread-safe way. This should be backported up to 2.7 after a period of observation.
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)