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After sending some data, we try to wake the H1 stream to resume data processing at the stream level, except if the output buffer is still full. However we must also be sure the mux is not blocked because of an allocation failure on this buffer. Otherwise, it may lead to a ping-pong loop between the stream and the mux to send more data with an unallocated output buffer. Note there is a mechanism to queue buffers allocations when a failure happens. However this mechanism is totally broken since the filters were introducted in HAProxy 1.7. And it is worse now with the multiplexers. So this patch fixes a possible loop needlessly consuming all the CPU. But buffer allocation failures must remain pretty rare. This patch must be backported as far as 2.0.
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)