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readahead: use emulation

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It seems that readahead() does not work on btrfs, or at least it has
no discernable effect.  Enable the workaround instead.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2022-11-10 10:09:47 -05:00
parent a2e1887c52
commit d345ea2b78
1 changed files with 1 additions and 1 deletions
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src/bees.cc
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@ -220,7 +220,7 @@ bees_readahead(int const fd, off_t offset, size_t size)
Timer readahead_timer;
BEESNOTE("readahead " << name_fd(fd) << " offset " << to_hex(offset) << " len " << pretty(size));
BEESTOOLONG("readahead " << name_fd(fd) << " offset " << to_hex(offset) << " len " << pretty(size));
#if 1
#if 0
// In the kernel, readahead() is identical to posix_fadvise(..., POSIX_FADV_DONTNEED)
DIE_IF_NON_ZERO(readahead(fd, offset, size));
#else