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authorChristoph Hellwig <hch@lst.de>2023-01-19 09:36:24 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2023-02-03 00:37:16 +0300
commit4a2095887340e75dfb07575950fcdb7fbcbec64b (patch)
tree05ee0608be9a9d6aa2e498ae1f5f065f28e0207b /fs/f2fs
parentdede3525edbff6e6244668f81d66a48105d3e43b (diff)
downloadlinux-4a2095887340e75dfb07575950fcdb7fbcbec64b.tar.xz
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.c48
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) {