From: Yonggil Song yonggil.song@samsung.com
[ Upstream commit e219aecfd4b766c4e878a3769057e9809f7fcadc ]
When f2fs chooses GC victim in large section & LFS mode, next_victim_seg[gc_type] is referenced first. After segment is freed, next_victim_seg[gc_type] has the next segment number. However, next_victim_seg[gc_type] still has the last segment number even after the last segment of section is freed. In this case, when f2fs chooses a victim for the next GC round, the last segment of previous victim section is chosen as a victim.
Initialize next_victim_seg[gc_type] to NULL_SEGNO for the last segment in large section.
Fixes: e3080b0120a1 ("f2fs: support subsectional garbage collection") Signed-off-by: Yonggil Song yonggil.song@samsung.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/gc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index af915f801455..68eb1d33128b 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -1738,8 +1738,9 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi, get_valid_blocks(sbi, segno, false) == 0) seg_freed++;
- if (__is_large_section(sbi) && segno + 1 < end_segno) - sbi->next_victim_seg[gc_type] = segno + 1; + if (__is_large_section(sbi)) + sbi->next_victim_seg[gc_type] = + (segno + 1 < end_segno) ? segno + 1 : NULL_SEGNO; skip: f2fs_put_page(sum_page, 0); }