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f2fs: avoid victim selection from previous victim section

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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: e3080b0120 ("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>
This commit is contained in:
Yonggil Song 2022-11-22 18:03:20 +09:00 • committed by Jaegeuk Kim
parent 78a99fe625
commit e219aecfd4
1 changed files with 3 additions and 2 deletions
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5
fs/f2fs/gc.c
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@ -1749,8 +1749,9 @@ freed:
get_valid_blocks(sbi, segno, false) == 0) get_valid_blocks(sbi, segno, false) == 0)
seg_freed++; seg_freed++;
if (__is_large_section(sbi) && segno + 1 < end_segno) if (__is_large_section(sbi))
sbi->next_victim_seg[gc_type] = segno + 1; sbi->next_victim_seg[gc_type] =
(segno + 1 < end_segno) ? segno + 1 : NULL_SEGNO;
skip: skip:
f2fs_put_page(sum_page, 0); f2fs_put_page(sum_page, 0);
} }