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bcachefs: avoid overflowing LRU_TIME_BITS for cached data lru

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Reported-by: syzbot+510b0b28f8e6de64d307@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-08-16 12:41:46 -04:00
parent 075cabf324
commit 9482f3b053
1 changed files with 3 additions and 1 deletions
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4
fs/bcachefs/alloc_background.h
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@ -150,7 +150,9 @@ static inline void alloc_data_type_set(struct bch_alloc_v4 *a, enum bch_data_typ
static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a) static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a)
{ {
return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0; return a.data_type == BCH_DATA_cached
? a.io_time[READ] & LRU_TIME_MAX
: 0;
} }
#define DATA_TYPES_MOVABLE \ #define DATA_TYPES_MOVABLE \