[f2fs-dev] [PATCH 1/3] f2fs: zone: introduce first_zoned_segno in f2fs_sb_info

[Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>]

first_zoned_segno() returns a fixed value, let's cache it in
structure f2fs_sb_info to avoid redundant calculation.

Signed-off-by: Chao Yu <chao@kernel.org>
---
 fs/f2fs/f2fs.h    |  1 +
 fs/f2fs/segment.c |  4 ++--
 fs/f2fs/segment.h | 10 ----------
 fs/f2fs/super.c   | 13 +++++++++++++
 4 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0ff7f2812312..55bcd411257a 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1760,6 +1760,7 @@ struct f2fs_sb_info {
 	unsigned int dirty_device;		/* for checkpoint data flush */
 	spinlock_t dev_lock;			/* protect dirty_device */
 	bool aligned_blksize;			/* all devices has the same logical blksize */
+	unsigned int first_zoned_segno;		/* first zoned segno */
 
 	/* For write statistics */
 	u64 sectors_written_start;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index e1003e262184..a1806976f4ad 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2732,7 +2732,7 @@ static int get_new_segment(struct f2fs_sb_info *sbi,
 		if (sbi->blkzone_alloc_policy == BLKZONE_ALLOC_PRIOR_CONV || pinning)
 			segno = 0;
 		else
-			segno = max(first_zoned_segno(sbi), *newseg);
+			segno = max(sbi->first_zoned_segno, *newseg);
 		hint = GET_SEC_FROM_SEG(sbi, segno);
 	}
 #endif
@@ -2744,7 +2744,7 @@ static int get_new_segment(struct f2fs_sb_info *sbi,
 	if (secno >= MAIN_SECS(sbi) && f2fs_sb_has_blkzoned(sbi)) {
 		/* Write only to sequential zones */
 		if (sbi->blkzone_alloc_policy == BLKZONE_ALLOC_ONLY_SEQ) {
-			hint = GET_SEC_FROM_SEG(sbi, first_zoned_segno(sbi));
+			hint = GET_SEC_FROM_SEG(sbi, sbi->first_zoned_segno);
 			secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
 		} else
 			secno = find_first_zero_bit(free_i->free_secmap,
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index cd6325f3b9ca..838c436266f4 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -971,13 +971,3 @@ static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force)
 	dcc->discard_wake = true;
 	wake_up_interruptible_all(&dcc->discard_wait_queue);
 }
-
-static inline unsigned int first_zoned_segno(struct f2fs_sb_info *sbi)
-{
-	int devi;
-
-	for (devi = 0; devi < sbi->s_ndevs; devi++)
-		if (bdev_is_zoned(FDEV(devi).bdev))
-			return GET_SEGNO(sbi, FDEV(devi).start_blk);
-	return 0;
-}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 0d96e352b4ac..9325d8dc7f7d 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4223,6 +4223,16 @@ static void f2fs_record_error_work(struct work_struct *work)
 	f2fs_record_stop_reason(sbi);
 }
 
+static inline unsigned int get_first_zoned_segno(struct f2fs_sb_info *sbi)
+{
+	int devi;
+
+	for (devi = 0; devi < sbi->s_ndevs; devi++)
+		if (bdev_is_zoned(FDEV(devi).bdev))
+			return GET_SEGNO(sbi, FDEV(devi).start_blk);
+	return 0;
+}
+
 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
@@ -4623,6 +4633,9 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 	/* For write statistics */
 	sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
 
+	/* get segno of first zoned block device */
+	sbi->first_zoned_segno = get_first_zoned_segno(sbi);
+
 	/* Read accumulated write IO statistics if exists */
 	seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
 	if (__exist_node_summaries(sbi))
-- 
2.40.1



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