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f2fs: change reclaim rate in percentage

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It is more reasonable to determine the reclaiming rate of prefree segments
according to the volume size, which is set to 5% by default.
For example, if the volume is 128GB, the prefree segments are reclaimed
when the number reaches to 6.4GB.

Signed-off-by: Jaegeuk Kim <[email protected]>
This commit is contained in:
Jaegeuk Kim 2014-03-19 14:17:21 +09:00
commit 58c410351e
3 changed files with 8 additions and 5 deletions
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8
Documentation/filesystems/f2fs.txt
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@ -169,9 +169,11 @@ Files in /sys/fs/f2fs/<devname>
reclaim_segments This parameter controls the number of prefree
segments to be reclaimed. If the number of prefree
segments is larger than this number, f2fs tries to
conduct checkpoint to reclaim the prefree segments
to free segments. By default, 100 segments, 200MB.
segments is larger than the number of segments
in the proportion to the percentage over total
volume size, f2fs tries to conduct checkpoint to
reclaim the prefree segments to free segments.
By default, 5% over total # of segments.
max_small_discards This parameter controls the number of discard
commands that consist small blocks less than 2MB.