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| author | Christoph Hellwig <hch@lst.de> | 2023-01-19 07:36:24 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-02-02 13:37:16 -0800 |
| commit | 4a2095887340e75dfb07575950fcdb7fbcbec64b (patch) | |
| tree | 05ee0608be9a9d6aa2e498ae1f5f065f28e0207b /fs/f2fs | |
| parent | dede3525edbff6e6244668f81d66a48105d3e43b (diff) | |
| download | linux-4a2095887340e75dfb07575950fcdb7fbcbec64b.tar.gz linux-4a2095887340e75dfb07575950fcdb7fbcbec64b.tar.bz2 linux-4a2095887340e75dfb07575950fcdb7fbcbec64b.zip | |
f2fs: refactor next blk selection
Remove __refresh_next_blkoff by opencoding the SSR vs LFS segment check
in the only caller, and then add helpers for SSR block selection and
blkoff randomization instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/segment.c | 48 |
1 files changed, 23 insertions, 25 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 55720251755e..14a9651e4f31 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2632,30 +2632,10 @@ static int __next_free_blkoff(struct f2fs_sb_info *sbi, return __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start); } -/* - * If a segment is written by LFS manner, next block offset is just obtained - * by increasing the current block offset. However, if a segment is written by - * SSR manner, next block offset obtained by calling __next_free_blkoff - */ -static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, - struct curseg_info *seg) +static int f2fs_find_next_ssr_block(struct f2fs_sb_info *sbi, + struct curseg_info *seg) { - if (seg->alloc_type == SSR) { - seg->next_blkoff = - __next_free_blkoff(sbi, seg->segno, - seg->next_blkoff + 1); - } else { - seg->next_blkoff++; - if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) { - /* To allocate block chunks in different sizes, use random number */ - if (--seg->fragment_remained_chunk <= 0) { - seg->fragment_remained_chunk = - get_random_u32_inclusive(1, sbi->max_fragment_chunk); - seg->next_blkoff += - get_random_u32_inclusive(1, sbi->max_fragment_hole); - } - } - } + return __next_free_blkoff(sbi, seg->segno, seg->next_blkoff + 1); } bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno) @@ -3232,6 +3212,19 @@ static int __get_segment_type(struct f2fs_io_info *fio) return type; } +static void f2fs_randomize_chunk(struct f2fs_sb_info *sbi, + struct curseg_info *seg) +{ + /* To allocate block chunks in different sizes, use random number */ + if (--seg->fragment_remained_chunk > 0) + return; + + seg->fragment_remained_chunk = + get_random_u32_inclusive(1, sbi->max_fragment_chunk); + seg->next_blkoff += + get_random_u32_inclusive(1, sbi->max_fragment_hole); +} + void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page, block_t old_blkaddr, block_t *new_blkaddr, struct f2fs_summary *sum, int type, @@ -3261,8 +3254,13 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page, f2fs_wait_discard_bio(sbi, *new_blkaddr); curseg->sum_blk->entries[curseg->next_blkoff] = *sum; - __refresh_next_blkoff(sbi, curseg); - + if (curseg->alloc_type == SSR) { + curseg->next_blkoff = f2fs_find_next_ssr_block(sbi, curseg); + } else { + curseg->next_blkoff++; + if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK) + f2fs_randomize_chunk(sbi, curseg); + } stat_inc_block_count(sbi, curseg); if (from_gc) { |