Yonggil Song bb895786a4 f2fs: avoid victim selection from previous victim section
[ 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>
2022-12-31 13:14:25 +01:00
..
2022-04-08 14:23:58 +02:00
2021-03-30 18:48:56 -07:00
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2021-08-23 10:25:51 -07:00
2022-12-31 13:14:22 +01:00