diff --git a/fs/bcachefs/disk_accounting.h b/fs/bcachefs/disk_accounting.h
index 5360cbb3ec29..f4372cafea2e 100644
--- a/fs/bcachefs/disk_accounting.h
+++ b/fs/bcachefs/disk_accounting.h
@@ -210,11 +210,13 @@ static inline void bch2_accounting_mem_read_counters(struct bch_accounting_mem *
 static inline void bch2_accounting_mem_read(struct bch_fs *c, struct bpos p,
 					    u64 *v, unsigned nr)
 {
+	percpu_down_read(&c->mark_lock);
 	struct bch_accounting_mem *acc = &c->accounting;
 	unsigned idx = eytzinger0_find(acc->k.data, acc->k.nr, sizeof(acc->k.data[0]),
 				       accounting_pos_cmp, &p);
 
 	bch2_accounting_mem_read_counters(acc, idx, v, nr, false);
+	percpu_up_read(&c->mark_lock);
 }
 
 static inline struct bversion journal_pos_to_bversion(struct journal_res *res, unsigned offset)