Leonid Yuriev 3e0fad1cf6 mdbx: rework (NO)READAHEAD handling. ... Resolves https://github.com/erthink/libmdbx/issues/164 --- NOTE: Seems there is a bug in the Mach/Darwin/OSX kernel, because MADV_WILLNEED with offset != 0 may cause SIGBUS on following access to the hinted region. 19.6.0 Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64 x86_64 Change-Id: I11ebbf2bd35e3dba9d078be16cb5678aecf8329c		2021-04-17 01:12:16 +03:00
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spelling	mdbx: rework (NO)READAHEAD handling.	2021-04-17 01:12:16 +03:00