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-rw-r--r--fs/f2fs/segment.h75
1 files changed, 50 insertions, 25 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 5731682..7091204 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)
@@ -57,6 +57,9 @@
((blk_addr) - SM_I(sbi)->seg0_blkaddr)
#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \
(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
+#define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \
+ (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1))
+
#define GET_SEGNO(sbi, blk_addr) \
(((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ? \
NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
@@ -377,26 +380,12 @@ static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
static inline block_t written_block_count(struct f2fs_sb_info *sbi)
{
- struct sit_info *sit_i = SIT_I(sbi);
- block_t vblocks;
-
- mutex_lock(&sit_i->sentry_lock);
- vblocks = sit_i->written_valid_blocks;
- mutex_unlock(&sit_i->sentry_lock);
-
- return vblocks;
+ return SIT_I(sbi)->written_valid_blocks;
}
static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
{
- struct free_segmap_info *free_i = FREE_I(sbi);
- unsigned int free_segs;
-
- read_lock(&free_i->segmap_lock);
- free_segs = free_i->free_segments;
- read_unlock(&free_i->segmap_lock);
-
- return free_segs;
+ return FREE_I(sbi)->free_segments;
}
static inline int reserved_segments(struct f2fs_sb_info *sbi)
@@ -406,14 +395,7 @@ static inline int reserved_segments(struct f2fs_sb_info *sbi)
static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
{
- struct free_segmap_info *free_i = FREE_I(sbi);
- unsigned int free_secs;
-
- read_lock(&free_i->segmap_lock);
- free_secs = free_i->free_sections;
- read_unlock(&free_i->segmap_lock);
-
- return free_secs;
+ return FREE_I(sbi)->free_sections;
}
static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
@@ -682,3 +664,46 @@ static inline unsigned int max_hw_blocks(struct f2fs_sb_info *sbi)
struct request_queue *q = bdev_get_queue(bdev);
return SECTOR_TO_BLOCK(sbi, queue_max_sectors(q));
}
+
+/*
+ * It is very important to gather dirty pages and write at once, so that we can
+ * submit a big bio without interfering other data writes.
+ * By default, 512 pages for directory data,
+ * 512 pages (2MB) * 3 for three types of nodes, and
+ * max_bio_blocks for meta are set.
+ */
+static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type)
+{
+ if (type == DATA)
+ return sbi->blocks_per_seg;
+ else if (type == NODE)
+ return 3 * sbi->blocks_per_seg;
+ else if (type == META)
+ return MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+ else
+ return 0;
+}
+
+/*
+ * When writing pages, it'd better align nr_to_write for segment size.
+ */
+static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type,
+ struct writeback_control *wbc)
+{
+ long nr_to_write, desired;
+
+ if (wbc->sync_mode != WB_SYNC_NONE)
+ return 0;
+
+ nr_to_write = wbc->nr_to_write;
+
+ if (type == DATA)
+ desired = 4096;
+ else if (type == NODE)
+ desired = 3 * max_hw_blocks(sbi);
+ else
+ desired = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
+
+ wbc->nr_to_write = desired;
+ return desired - nr_to_write;
+}
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