The stable release with the hotfix/workaround for a flaw of Linux 4.19 (at least) unified page/buffer cache. See [issue#269](https://github.com/erthink/libmdbx/issues/269) for more information. Acknowledgements: ----------------- - [Simon Leier](https://github.com/leisim) for reporting and testing. - [Kai Wetlesen](https://github.com/kaiwetlesen) for [RPMs](http://copr.fedorainfracloud.org/coprs/kwetlesen/libmdbx/). - [Tullio Canepa](https://github.com/canepat) for reporting C++ API issue and contributing. Fixes: ------ - [Added workaround](https://github.com/erthink/libmdbx/issues/269) for a flaw of Linux 4.19 (at least) unified page/buffer cache. - [Fixed/Reworked](https://github.com/erthink/libmdbx/pull/270) move-assignment operators for "managed" classes of C++ API. - Fixed potential `SIGSEGV` while open DB with overrided non-default page size. - [Made](https://github.com/erthink/libmdbx/issues/267) `mdbx_env_open()` idempotence in failure cases. - Refined/Fixed pages reservation inside `mdbx_update_gc()` to avoid non-reclamation in a rare cases. - Fixed typo in a retained space calculation for the hsr-callback. Minors: ------- - Reworked functions for meta-pages, split-off non-volatile. - Disentangled C11-atomic fences/barriers and pure-functions (with `__attribute__((__pure__))`) to avoid compiler misoptimization. - Fixed hypotetic unaligned access to 64-bit dwords on ARM with `__ARM_FEATURE_UNALIGNED` defined. - Reasonable paranoia that makes clarity for code readers. - Minor fixes Doxygen references, comments, descriptions, etc. Signed-off-by: Леонид Юрьев (Leonid Yuriev) <leo@yuriev.ru>
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