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-rw-r--r--Documentation/filesystems/f2fs.txt8
-rw-r--r--fs/f2fs/segment.c3
-rw-r--r--fs/f2fs/segment.h2
3 files changed, 8 insertions, 5 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index f415b9fc4cc8..2f6d0218dd22 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -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.
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 6c5a4f0218ca..e7ff23a536a4 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1758,7 +1758,8 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
- sm_info->rec_prefree_segments = DEF_RECLAIM_PREFREE_SEGMENTS;
+ sm_info->rec_prefree_segments = sm_info->main_segments *
+ DEF_RECLAIM_PREFREE_SEGMENTS / 100;
sm_info->ipu_policy = F2FS_IPU_DISABLE;
sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 9fc46ee27bb8..7091204680f4 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -14,7 +14,7 @@
#define NULL_SEGNO ((unsigned int)(~0))
#define NULL_SECNO ((unsigned int)(~0))
-#define DEF_RECLAIM_PREFREE_SEGMENTS 100 /* 200MB of prefree segments */
+#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */
/* L: Logical segment # in volume, R: Relative segment # in main area */
#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)