Lines Matching refs:dc
30 static uint64_t __calc_target_rate(struct cached_dev *dc) in __calc_target_rate() argument
32 struct cache_set *c = dc->disk.c; in __calc_target_rate()
48 div64_u64(bdev_nr_sectors(dc->bdev) << WRITEBACK_SHARE_SHIFT, in __calc_target_rate()
52 div_u64(cache_sectors * dc->writeback_percent, 100); in __calc_target_rate()
61 static void __update_writeback_rate(struct cached_dev *dc) in __update_writeback_rate() argument
83 int64_t target = __calc_target_rate(dc); in __update_writeback_rate()
84 int64_t dirty = bcache_dev_sectors_dirty(&dc->disk); in __update_writeback_rate()
87 div_s64(error, dc->writeback_rate_p_term_inverse); in __update_writeback_rate()
101 struct cache_set *c = dc->disk.c; in __update_writeback_rate()
105 if (dc->writeback_consider_fragment && in __update_writeback_rate()
113 fp_term = (int64_t)dc->writeback_rate_fp_term_low * in __update_writeback_rate()
116 fp_term = (int64_t)dc->writeback_rate_fp_term_mid * in __update_writeback_rate()
119 fp_term = (int64_t)dc->writeback_rate_fp_term_high * in __update_writeback_rate()
129 if ((error < 0 && dc->writeback_rate_integral > 0) || in __update_writeback_rate()
131 dc->writeback_rate.next + NSEC_PER_MSEC))) { in __update_writeback_rate()
142 dc->writeback_rate_integral += error * in __update_writeback_rate()
143 dc->writeback_rate_update_seconds; in __update_writeback_rate()
146 integral_scaled = div_s64(dc->writeback_rate_integral, in __update_writeback_rate()
147 dc->writeback_rate_i_term_inverse); in __update_writeback_rate()
150 dc->writeback_rate_minimum, NSEC_PER_SEC); in __update_writeback_rate()
152 dc->writeback_rate_proportional = proportional_scaled; in __update_writeback_rate()
153 dc->writeback_rate_integral_scaled = integral_scaled; in __update_writeback_rate()
154 dc->writeback_rate_change = new_rate - in __update_writeback_rate()
155 atomic_long_read(&dc->writeback_rate.rate); in __update_writeback_rate()
156 atomic_long_set(&dc->writeback_rate.rate, new_rate); in __update_writeback_rate()
157 dc->writeback_rate_target = target; in __update_writeback_rate()
208 struct cached_dev *dc) in set_at_max_writeback_rate() argument
224 atomic_long_set(&dc->writeback_rate.rate, INT_MAX); in set_at_max_writeback_rate()
227 dc->writeback_rate_proportional = 0; in set_at_max_writeback_rate()
228 dc->writeback_rate_integral_scaled = 0; in set_at_max_writeback_rate()
229 dc->writeback_rate_change = 0; in set_at_max_writeback_rate()
244 struct cached_dev *dc = container_of(to_delayed_work(work), in update_writeback_rate() local
247 struct cache_set *c = dc->disk.c; in update_writeback_rate()
253 set_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
261 if (!test_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags) || in update_writeback_rate()
263 clear_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
275 if (atomic_read(&dc->has_dirty) && dc->writeback_percent && in update_writeback_rate()
276 !set_at_max_writeback_rate(c, dc)) { in update_writeback_rate()
278 if (!down_read_trylock((&dc->writeback_lock))) { in update_writeback_rate()
279 dc->rate_update_retry++; in update_writeback_rate()
280 if (dc->rate_update_retry <= in update_writeback_rate()
283 down_read(&dc->writeback_lock); in update_writeback_rate()
284 dc->rate_update_retry = 0; in update_writeback_rate()
286 __update_writeback_rate(dc); in update_writeback_rate()
288 up_read(&dc->writeback_lock); in update_writeback_rate()
297 if (test_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags) && in update_writeback_rate()
299 schedule_delayed_work(&dc->writeback_rate_update, in update_writeback_rate()
300 dc->writeback_rate_update_seconds * HZ); in update_writeback_rate()
307 clear_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
312 static unsigned int writeback_delay(struct cached_dev *dc, in writeback_delay() argument
315 if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) || in writeback_delay()
316 !dc->writeback_percent) in writeback_delay()
319 return bch_next_delay(&dc->writeback_rate, sectors); in writeback_delay()
324 struct cached_dev *dc; member
336 if (!io->dc->writeback_percent) in dirty_init()
355 struct cached_dev *dc = io->dc; in write_dirty_finish() local
372 atomic_inc(&PTR_BUCKET(dc->disk.c, &w->key, i)->pin); in write_dirty_finish()
374 ret = bch_btree_insert(dc->disk.c, &keys, NULL, &w->key); in write_dirty_finish()
380 ? &dc->disk.c->writeback_keys_failed in write_dirty_finish()
381 : &dc->disk.c->writeback_keys_done); in write_dirty_finish()
384 bch_keybuf_del(&dc->writeback_keys, w); in write_dirty_finish()
385 up(&dc->in_flight); in write_dirty_finish()
397 bch_count_backing_io_errors(io->dc, bio); in dirty_endio()
407 struct cached_dev *dc = io->dc; in write_dirty() local
411 if (atomic_read(&dc->writeback_sequence_next) != io->sequence) { in write_dirty()
413 closure_wait(&dc->writeback_ordering_wait, cl); in write_dirty()
415 if (atomic_read(&dc->writeback_sequence_next) == io->sequence) { in write_dirty()
420 closure_wake_up(&dc->writeback_ordering_wait); in write_dirty()
423 continue_at(cl, write_dirty, io->dc->writeback_write_wq); in write_dirty()
439 bio_set_dev(&io->bio, io->dc->bdev); in write_dirty()
443 closure_bio_submit(io->dc->disk.c, &io->bio, cl); in write_dirty()
446 atomic_set(&dc->writeback_sequence_next, next_sequence); in write_dirty()
447 closure_wake_up(&dc->writeback_ordering_wait); in write_dirty()
449 continue_at(cl, write_dirty_finish, io->dc->writeback_write_wq); in write_dirty()
458 bch_count_io_errors(io->dc->disk.c->cache, in read_dirty_endio()
469 closure_bio_submit(io->dc->disk.c, &io->bio, cl); in read_dirty_submit()
471 continue_at(cl, write_dirty, io->dc->writeback_write_wq); in read_dirty_submit()
474 static void read_dirty(struct cached_dev *dc) in read_dirty() argument
484 BUG_ON(!llist_empty(&dc->writeback_ordering_wait.list)); in read_dirty()
485 atomic_set(&dc->writeback_sequence_next, sequence); in read_dirty()
493 next = bch_keybuf_next(&dc->writeback_keys); in read_dirty()
496 !test_bit(CACHE_SET_IO_DISABLE, &dc->disk.c->flags) && in read_dirty()
502 BUG_ON(ptr_stale(dc->disk.c, &next->key, 0)); in read_dirty()
533 } while ((next = bch_keybuf_next(&dc->writeback_keys))); in read_dirty()
546 io->dc = dc; in read_dirty()
552 bio_set_dev(&io->bio, dc->disk.c->cache->bdev); in read_dirty()
560 down(&dc->in_flight); in read_dirty()
570 delay = writeback_delay(dc, size); in read_dirty()
573 !test_bit(CACHE_SET_IO_DISABLE, &dc->disk.c->flags) && in read_dirty()
576 delay = writeback_delay(dc, 0); in read_dirty()
584 bch_keybuf_del(&dc->writeback_keys, w); in read_dirty()
643 struct cached_dev *dc = container_of(buf, in dirty_pred() local
647 BUG_ON(KEY_INODE(k) != dc->disk.id); in dirty_pred()
652 static void refill_full_stripes(struct cached_dev *dc) in refill_full_stripes() argument
654 struct keybuf *buf = &dc->writeback_keys; in refill_full_stripes()
659 stripe = offset_to_stripe(&dc->disk, KEY_OFFSET(&buf->last_scanned)); in refill_full_stripes()
666 stripe = find_next_bit(dc->disk.full_dirty_stripes, in refill_full_stripes()
667 dc->disk.nr_stripes, stripe); in refill_full_stripes()
669 if (stripe == dc->disk.nr_stripes) in refill_full_stripes()
672 next_stripe = find_next_zero_bit(dc->disk.full_dirty_stripes, in refill_full_stripes()
673 dc->disk.nr_stripes, stripe); in refill_full_stripes()
675 buf->last_scanned = KEY(dc->disk.id, in refill_full_stripes()
676 stripe * dc->disk.stripe_size, 0); in refill_full_stripes()
678 bch_refill_keybuf(dc->disk.c, buf, in refill_full_stripes()
679 &KEY(dc->disk.id, in refill_full_stripes()
680 next_stripe * dc->disk.stripe_size, 0), in refill_full_stripes()
691 if (stripe == dc->disk.nr_stripes) { in refill_full_stripes()
701 static bool refill_dirty(struct cached_dev *dc) in refill_dirty() argument
703 struct keybuf *buf = &dc->writeback_keys; in refill_dirty()
704 struct bkey start = KEY(dc->disk.id, 0, 0); in refill_dirty()
705 struct bkey end = KEY(dc->disk.id, MAX_KEY_OFFSET, 0); in refill_dirty()
717 if (dc->partial_stripes_expensive) { in refill_dirty()
718 refill_full_stripes(dc); in refill_dirty()
724 bch_refill_keybuf(dc->disk.c, buf, &end, dirty_pred); in refill_dirty()
734 bch_refill_keybuf(dc->disk.c, buf, &start_pos, dirty_pred); in refill_dirty()
741 struct cached_dev *dc = arg; in bch_writeback_thread() local
742 struct cache_set *c = dc->disk.c; in bch_writeback_thread()
745 bch_ratelimit_reset(&dc->writeback_rate); in bch_writeback_thread()
749 down_write(&dc->writeback_lock); in bch_writeback_thread()
758 if (!test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) && in bch_writeback_thread()
759 (!atomic_read(&dc->has_dirty) || !dc->writeback_running)) { in bch_writeback_thread()
760 up_write(&dc->writeback_lock); in bch_writeback_thread()
773 searched_full_index = refill_dirty(dc); in bch_writeback_thread()
776 RB_EMPTY_ROOT(&dc->writeback_keys.keys)) { in bch_writeback_thread()
777 atomic_set(&dc->has_dirty, 0); in bch_writeback_thread()
778 SET_BDEV_STATE(&dc->sb, BDEV_STATE_CLEAN); in bch_writeback_thread()
779 bch_write_bdev_super(dc, NULL); in bch_writeback_thread()
786 if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags)) { in bch_writeback_thread()
790 memset(&dc->sb.set_uuid, 0, 16); in bch_writeback_thread()
791 SET_BDEV_STATE(&dc->sb, BDEV_STATE_NONE); in bch_writeback_thread()
793 bch_write_bdev_super(dc, &cl); in bch_writeback_thread()
796 up_write(&dc->writeback_lock); in bch_writeback_thread()
818 up_write(&dc->writeback_lock); in bch_writeback_thread()
820 read_dirty(dc); in bch_writeback_thread()
823 unsigned int delay = dc->writeback_delay * HZ; in bch_writeback_thread()
828 !test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags)) in bch_writeback_thread()
831 bch_ratelimit_reset(&dc->writeback_rate); in bch_writeback_thread()
835 if (dc->writeback_write_wq) in bch_writeback_thread()
836 destroy_workqueue(dc->writeback_write_wq); in bch_writeback_thread()
838 cached_dev_put(dc); in bch_writeback_thread()
1048 void bch_cached_dev_writeback_init(struct cached_dev *dc) in bch_cached_dev_writeback_init() argument
1050 sema_init(&dc->in_flight, 64); in bch_cached_dev_writeback_init()
1051 init_rwsem(&dc->writeback_lock); in bch_cached_dev_writeback_init()
1052 bch_keybuf_init(&dc->writeback_keys); in bch_cached_dev_writeback_init()
1054 dc->writeback_metadata = true; in bch_cached_dev_writeback_init()
1055 dc->writeback_running = false; in bch_cached_dev_writeback_init()
1056 dc->writeback_consider_fragment = true; in bch_cached_dev_writeback_init()
1057 dc->writeback_percent = 10; in bch_cached_dev_writeback_init()
1058 dc->writeback_delay = 30; in bch_cached_dev_writeback_init()
1059 atomic_long_set(&dc->writeback_rate.rate, 1024); in bch_cached_dev_writeback_init()
1060 dc->writeback_rate_minimum = 8; in bch_cached_dev_writeback_init()
1062 dc->writeback_rate_update_seconds = WRITEBACK_RATE_UPDATE_SECS_DEFAULT; in bch_cached_dev_writeback_init()
1063 dc->writeback_rate_p_term_inverse = 40; in bch_cached_dev_writeback_init()
1064 dc->writeback_rate_fp_term_low = 1; in bch_cached_dev_writeback_init()
1065 dc->writeback_rate_fp_term_mid = 10; in bch_cached_dev_writeback_init()
1066 dc->writeback_rate_fp_term_high = 1000; in bch_cached_dev_writeback_init()
1067 dc->writeback_rate_i_term_inverse = 10000; in bch_cached_dev_writeback_init()
1070 dc->rate_update_retry = 0; in bch_cached_dev_writeback_init()
1072 WARN_ON(test_and_clear_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags)); in bch_cached_dev_writeback_init()
1073 INIT_DELAYED_WORK(&dc->writeback_rate_update, update_writeback_rate); in bch_cached_dev_writeback_init()
1076 int bch_cached_dev_writeback_start(struct cached_dev *dc) in bch_cached_dev_writeback_start() argument
1078 dc->writeback_write_wq = alloc_workqueue("bcache_writeback_wq", in bch_cached_dev_writeback_start()
1080 if (!dc->writeback_write_wq) in bch_cached_dev_writeback_start()
1083 cached_dev_get(dc); in bch_cached_dev_writeback_start()
1084 dc->writeback_thread = kthread_create(bch_writeback_thread, dc, in bch_cached_dev_writeback_start()
1086 if (IS_ERR(dc->writeback_thread)) { in bch_cached_dev_writeback_start()
1087 cached_dev_put(dc); in bch_cached_dev_writeback_start()
1088 destroy_workqueue(dc->writeback_write_wq); in bch_cached_dev_writeback_start()
1089 return PTR_ERR(dc->writeback_thread); in bch_cached_dev_writeback_start()
1091 dc->writeback_running = true; in bch_cached_dev_writeback_start()
1093 WARN_ON(test_and_set_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags)); in bch_cached_dev_writeback_start()
1094 schedule_delayed_work(&dc->writeback_rate_update, in bch_cached_dev_writeback_start()
1095 dc->writeback_rate_update_seconds * HZ); in bch_cached_dev_writeback_start()
1097 bch_writeback_queue(dc); in bch_cached_dev_writeback_start()