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f2fs: ignore valid ratio when free section count is low

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Otherwise F2FS will not do GC in background in low free section.

Signed-off-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daeho Jeong 2025-07-18 15:04:31 -07:00 committed by Jaegeuk Kim
parent f0a7adfedc
commit e6d5e789c3
1 changed files with 12 additions and 6 deletions
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18
fs/f2fs/gc.c
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@ -384,14 +384,15 @@ static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
}
static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
unsigned int segno, struct victim_sel_policy *p)
unsigned int segno, struct victim_sel_policy *p,
unsigned int valid_thresh_ratio)
{
if (p->alloc_mode == SSR)
return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
if (p->one_time_gc && (get_valid_blocks(sbi, segno, true) >=
CAP_BLKS_PER_SEC(sbi) * sbi->gc_thread->valid_thresh_ratio /
100))
if (p->one_time_gc && (valid_thresh_ratio < 100) &&
(get_valid_blocks(sbi, segno, true) >=
CAP_BLKS_PER_SEC(sbi) * valid_thresh_ratio / 100))
return UINT_MAX;
/* alloc_mode == LFS */
@ -772,6 +773,7 @@ int f2fs_get_victim(struct f2fs_sb_info *sbi, unsigned int *result,
unsigned int secno, last_victim;
unsigned int last_segment;
unsigned int nsearched;
unsigned int valid_thresh_ratio = 100;
bool is_atgc;
int ret = 0;
@ -781,7 +783,11 @@ int f2fs_get_victim(struct f2fs_sb_info *sbi, unsigned int *result,
p.alloc_mode = alloc_mode;
p.age = age;
p.age_threshold = sbi->am.age_threshold;
p.one_time_gc = one_time;
if (one_time) {
p.one_time_gc = one_time;
if (has_enough_free_secs(sbi, 0, NR_PERSISTENT_LOG))
valid_thresh_ratio = sbi->gc_thread->valid_thresh_ratio;
}
retry:
select_policy(sbi, gc_type, type, &p);
@ -907,7 +913,7 @@ int f2fs_get_victim(struct f2fs_sb_info *sbi, unsigned int *result,
goto next;
}
cost = get_gc_cost(sbi, segno, &p);
cost = get_gc_cost(sbi, segno, &p, valid_thresh_ratio);
if (p.min_cost > cost) {
p.min_segno = segno;