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Fallocate space in advance on decompression.

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This often can speed up decompression of large files and decreases fragmentation.
This commit is contained in:
Con Kolivas 2011-02-26 23:26:00 +11:00
parent fd5a77ac21
commit cf03cb0c04
1 changed files with 3 additions and 0 deletions
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3
main.c
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@ -350,6 +350,9 @@ static void decompress_file(void)
failure("Inadequate free space to decompress file, use -f to override.\n"); failure("Inadequate free space to decompress file, use -f to override.\n");
} }
if (unlikely(posix_fallocate(fd_out, 0, expected_size)))
failure("Failed to fallocate fd_out in decompress_file\n");
fd_hist = open(control.outfile, O_RDONLY); fd_hist = open(control.outfile, O_RDONLY);
if (unlikely(fd_hist == -1)) if (unlikely(fd_hist == -1))
fatal("Failed to open history file %s\n", control.outfile); fatal("Failed to open history file %s\n", control.outfile);