diff options
Diffstat (limited to 'drivers/md/bcache/bcache.h')
| -rw-r--r-- | drivers/md/bcache/bcache.h | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 843877e017e1..12e5197f186c 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -320,14 +320,15 @@ struct cached_dev { */ atomic_t has_dirty; - struct bch_ratelimit writeback_rate; - struct delayed_work writeback_rate_update; - /* - * Internal to the writeback code, so read_dirty() can keep track of - * where it's at. + * Set to zero by things that touch the backing volume-- except + * writeback. Incremented by writeback. Used to determine when to + * accelerate idle writeback. */ - sector_t last_read; + atomic_t backing_idle; + + struct bch_ratelimit writeback_rate; + struct delayed_work writeback_rate_update; /* Limit number of writeback bios in flight */ struct semaphore in_flight; @@ -336,6 +337,14 @@ struct cached_dev { struct keybuf writeback_keys; + /* + * Order the write-half of writeback operations strongly in dispatch + * order. (Maintain LBA order; don't allow reads completing out of + * order to re-order the writes...) + */ + struct closure_waitlist writeback_ordering_wait; + atomic_t writeback_sequence_next; + /* For tracking sequential IO */ #define RECENT_IO_BITS 7 #define RECENT_IO (1 << RECENT_IO_BITS) @@ -488,6 +497,7 @@ struct cache_set { int caches_loaded; struct bcache_device **devices; + unsigned devices_max_used; struct list_head cached_devs; uint64_t cached_dev_sectors; struct closure caching; @@ -648,10 +658,15 @@ struct cache_set { atomic_long_t writeback_keys_done; atomic_long_t writeback_keys_failed; + atomic_long_t reclaim; + atomic_long_t flush_write; + atomic_long_t retry_flush_write; + enum { ON_ERROR_UNREGISTER, ON_ERROR_PANIC, } on_error; +#define DEFAULT_IO_ERROR_LIMIT 8 unsigned error_limit; unsigned error_decay; @@ -665,6 +680,8 @@ struct cache_set { #define BUCKET_HASH_BITS 12 struct hlist_head bucket_hash[1 << BUCKET_HASH_BITS]; + + DECLARE_HEAP(struct btree *, flush_btree); }; struct bbio { @@ -852,7 +869,7 @@ static inline void wake_up_allocators(struct cache_set *c) /* Forward declarations */ -void bch_count_io_errors(struct cache *, blk_status_t, const char *); +void bch_count_io_errors(struct cache *, blk_status_t, int, const char *); void bch_bbio_count_io_errors(struct cache_set *, struct bio *, blk_status_t, const char *); void bch_bbio_endio(struct cache_set *, struct bio *, blk_status_t, @@ -907,7 +924,7 @@ void bcache_write_super(struct cache_set *); int bch_flash_dev_create(struct cache_set *c, uint64_t size); -int bch_cached_dev_attach(struct cached_dev *, struct cache_set *); +int bch_cached_dev_attach(struct cached_dev *, struct cache_set *, uint8_t *); void bch_cached_dev_detach(struct cached_dev *); void bch_cached_dev_run(struct cached_dev *); void bcache_device_stop(struct bcache_device *); |