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An alignment issue on Sparc64 with ebtrees was reported in early 2017 here https://www.mail-archive.com/haproxy@formilux.org/msg25937.html and a similar one was finally reported in issue #512. The problem has its roots in the fact that 64-bit keys will end up being unaligned on such archs which do not support unaligned accesses. But on most platforms supporting unaligned accesses, dealing with smaller nodes results in better performance. One of the possible problems caused by attribute packed there is that it promotes a structure both to be unaligned and unpadded, which may come with fun if some fields of the struct itself are accessed and such a node is placed at an unaligned location. It's not a problem for regular unaligned accesses but may become one for atomic operations such as the CAS on leaf_p that's used in struct task. In practice we know that this struct is properly aligned and is a very edge case so this patch adds comments there to remind to be careful about it. This patch depends on previous patch "MINOR: compiler: move CPU capabilities definition from config.h and complete them" and could be backported to all stable branches. It fixes issues #512 and #9. |
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| include | ||
| reg-tests | ||
| scripts | ||
| src | ||
| tests | ||
| .cirrus.yml | ||
| .gitignore | ||
| .travis.yml | ||
| BRANCHES | ||
| CHANGELOG | ||
| CONTRIBUTING | ||
| INSTALL | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
| ROADMAP | ||
| SUBVERS | ||
| VERDATE | ||
| VERSION | ||
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)