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mdbx: fix ceiling/flooring madvise-edge inside mdbx_sync_locked().
Fixes https://github.com/erthink/libmdbx/issues/91 Change-Id: I17da72d9a53a2c7453d81488bd3297063de0b7d1
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@ -8403,27 +8403,26 @@ static int mdbx_sync_locked(MDBX_env *env, unsigned flags,
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#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */
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#if defined(MADV_DONTNEED)
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const size_t largest_bytes = pgno2bytes(env, largest_pgno);
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const size_t madvise_gap = (largest_bytes < 65536 * 256)
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? 65536
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: (largest_bytes > MEGABYTE * 4 * 256)
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? MEGABYTE * 4
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: largest_bytes >> 8;
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/* threshold to avoid unreasonable frequent madvise() calls */
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const size_t madvise_treshold = (largest_bytes < 65536 * 256)
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? 65536
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: (largest_bytes > MEGABYTE * 4 * 256)
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? MEGABYTE * 4
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: largest_bytes >> 10;
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const size_t discard_edge_bytes = bytes_align2os_bytes(
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env,
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(MDBX_RDONLY & (env->me_lck ? env->me_lck->mti_envmode : env->me_flags))
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? largest_bytes
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: largest_bytes + madvise_gap);
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env, ((MDBX_RDONLY &
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(env->me_lck ? env->me_lck->mti_envmode : env->me_flags))
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? largest_bytes
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: largest_bytes + madvise_treshold));
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const pgno_t discard_edge_pgno = bytes2pgno(env, discard_edge_bytes);
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const pgno_t prev_discarded_pgno = *env->me_discarded_tail;
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if (prev_discarded_pgno >
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discard_edge_pgno +
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/* threshold to avoid unreasonable frequent madvise() calls */
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bytes2pgno(env, madvise_gap)) {
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if (prev_discarded_pgno >=
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discard_edge_pgno + bytes2pgno(env, madvise_treshold)) {
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mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", *env->me_discarded_tail,
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largest_pgno);
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*env->me_discarded_tail = discard_edge_pgno;
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const size_t prev_discarded_bytes =
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pgno2bytes(env, prev_discarded_pgno) & ~(env->me_os_psize - 1);
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ceil_powerof2(pgno2bytes(env, prev_discarded_pgno), env->me_os_psize);
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mdbx_ensure(env, prev_discarded_bytes > discard_edge_bytes);
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int advise = MADV_DONTNEED;
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#if defined(MADV_FREE) && \
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