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7e70bfc8cb
thread_harmless_end() needs to wait for rdv_requests to disappear so that we're certain to respect a harmless promise that possibly allowed another thread to proceed under isolation. But this doesn't work in a signal handler because a thread could be interrupted by the debug handler while already waiting for isolation and with rdv_request>0. As such this function could cause a deadlock in such a signal handler. Let's implement a specific variant for this, thread_harmless_end_sig(), that just resets the thread's bit and doesn't wait. It must of course not be used past a check point that would allow the isolation requester to return and see the thread as temporarily harmless then turning back on its promise. This will be needed to fix a race in the debug handler.
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)