517 struct bch_dev {  struct
518 	struct kobject		kobj;
520 	atomic_long_t		ref;
521 	bool			dying;
522 	unsigned long		last_put;
524 	struct percpu_ref	ref;
526 	struct completion	ref_completion;
550 	struct bch_devs_mask	self;  argument
565 	struct bch_dev_usage_full __percpu  argument
566 				*usage;
569 	u64			alloc_cursor[3];
571 	unsigned		nr_open_buckets;
572 	unsigned		nr_partial_buckets;
573 	unsigned		nr_btree_reserve;
575 	size_t			inc_gen_needs_gc;
576 	size_t			inc_gen_really_needs_gc;
577 	size_t			buckets_waiting_on_journal;
579 	struct work_struct	invalidate_work;
580 	struct work_struct	discard_work;
581 	struct mutex		discard_buckets_in_flight_lock;
583 	struct work_struct	discard_fast_work;
585 	atomic64_t		rebalance_work;
587 	struct journal_device	journal;
588 	u64			prev_journal_sector;
590 	struct work_struct	io_error_work;
593 	atomic64_t		cur_latency[2];
594 	struct bch2_time_stats_quantiles io_latency[2];
597 	atomic_t		congested;
598 	u64			congested_last;
600 	struct io_count __percpu *io_done;