diff options
| -rw-r--r-- | fs/bcachefs/alloc_background.c | 146 | ||||
| -rw-r--r-- | fs/bcachefs/alloc_background.h | 1 | ||||
| -rw-r--r-- | fs/bcachefs/bcachefs.h | 6 |
3 files changed, 146 insertions, 7 deletions
diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c index c7be6afe8955..ccd6cbfd470e 100644 --- a/fs/bcachefs/alloc_background.c +++ b/fs/bcachefs/alloc_background.c @@ -29,6 +29,8 @@ #include <linux/sched/task.h> #include <linux/sort.h> +static void bch2_discard_one_bucket_fast(struct bch_fs *c, struct bpos bucket); + /* Persistent alloc info: */ static const unsigned BCH_ALLOC_V1_FIELD_BYTES[] = { @@ -866,14 +868,14 @@ int bch2_trigger_alloc(struct btree_trans *trans, #define statechange(expr) !eval_state(old_a, expr) && eval_state(new_a, expr) #define bucket_flushed(a) (!a->journal_seq || a->journal_seq <= c->journal.flushed_seq_ondisk) - if (statechange(a->data_type == BCH_DATA_free && - bucket_flushed(a))) + if (statechange(a->data_type == BCH_DATA_free) && + bucket_flushed(new_a)) closure_wake_up(&c->freelist_wait); - if (statechange(a->data_type == BCH_DATA_need_discard && - bucket_flushed(a)) && - !bch2_bucket_is_open(c, new.k->p.inode, new.k->p.offset)) - bch2_do_discards(c); + if (statechange(a->data_type == BCH_DATA_need_discard) && + !bch2_bucket_is_open(c, new.k->p.inode, new.k->p.offset) && + bucket_flushed(new_a)) + bch2_discard_one_bucket_fast(c, new.k->p); if (statechange(a->data_type == BCH_DATA_cached) && !bch2_bucket_is_open(c, new.k->p.inode, new.k->p.offset) && @@ -1609,6 +1611,36 @@ int bch2_check_alloc_to_lru_refs(struct bch_fs *c) return ret; } +static int discard_in_flight_add(struct bch_fs *c, struct bpos bucket) +{ + int ret; + + mutex_lock(&c->discard_buckets_in_flight_lock); + darray_for_each(c->discard_buckets_in_flight, i) + if (bkey_eq(*i, bucket)) { + ret = -EEXIST; + goto out; + } + + ret = darray_push(&c->discard_buckets_in_flight, bucket); +out: + mutex_unlock(&c->discard_buckets_in_flight_lock); + return ret; +} + +static void discard_in_flight_remove(struct bch_fs *c, struct bpos bucket) +{ + mutex_lock(&c->discard_buckets_in_flight_lock); + darray_for_each(c->discard_buckets_in_flight, i) + if (bkey_eq(*i, bucket)) { + darray_remove_item(&c->discard_buckets_in_flight, i); + goto found; + } + BUG(); +found: + mutex_unlock(&c->discard_buckets_in_flight_lock); +} + struct discard_buckets_state { u64 seen; u64 open; @@ -1647,6 +1679,7 @@ static int bch2_discard_one_bucket(struct btree_trans *trans, struct bch_dev *ca; struct bkey_i_alloc_v4 *a; struct printbuf buf = PRINTBUF; + bool discard_locked = false; int ret = 0; ca = bch_dev_bkey_exists(c, pos.inode); @@ -1714,6 +1747,11 @@ static int bch2_discard_one_bucket(struct btree_trans *trans, goto out; } + if (discard_in_flight_add(c, SPOS(iter.pos.inode, iter.pos.offset, true))) + goto out; + + discard_locked = true; + if (!bkey_eq(*discard_pos_done, iter.pos) && ca->mi.discard && !c->opts.nochanges) { /* @@ -1745,6 +1783,8 @@ write: count_event(c, bucket_discard); s->discarded++; out: + if (discard_locked) + discard_in_flight_remove(c, iter.pos); s->seen++; bch2_trans_iter_exit(trans, &iter); percpu_ref_put(&ca->io_ref); @@ -1784,6 +1824,93 @@ void bch2_do_discards(struct bch_fs *c) bch2_write_ref_put(c, BCH_WRITE_REF_discard); } +static int bch2_clear_bucket_needs_discard(struct btree_trans *trans, struct bpos bucket) +{ + struct btree_iter iter; + bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc, bucket, BTREE_ITER_INTENT); + struct bkey_s_c k = bch2_btree_iter_peek_slot(&iter); + int ret = bkey_err(k); + if (ret) + goto err; + + struct bkey_i_alloc_v4 *a = bch2_alloc_to_v4_mut(trans, k); + ret = PTR_ERR_OR_ZERO(a); + if (ret) + goto err; + + SET_BCH_ALLOC_V4_NEED_DISCARD(&a->v, false); + a->v.data_type = alloc_data_type(a->v, a->v.data_type); + + ret = bch2_trans_update(trans, &iter, &a->k_i, 0); +err: + bch2_trans_iter_exit(trans, &iter); + return ret; +} + +static void bch2_do_discards_fast_work(struct work_struct *work) +{ + struct bch_fs *c = container_of(work, struct bch_fs, discard_fast_work); + + while (1) { + bool got_bucket = false; + struct bpos bucket; + struct bch_dev *ca; + + mutex_lock(&c->discard_buckets_in_flight_lock); + darray_for_each(c->discard_buckets_in_flight, i) { + if (i->snapshot) + continue; + + ca = bch_dev_bkey_exists(c, i->inode); + + if (!percpu_ref_tryget(&ca->io_ref)) { + darray_remove_item(&c->discard_buckets_in_flight, i); + continue; + } + + got_bucket = true; + bucket = *i; + i->snapshot = true; + break; + } + mutex_unlock(&c->discard_buckets_in_flight_lock); + + if (!got_bucket) + break; + + if (ca->mi.discard && !c->opts.nochanges) + blkdev_issue_discard(ca->disk_sb.bdev, + bucket.offset * ca->mi.bucket_size, + ca->mi.bucket_size, + GFP_KERNEL); + + int ret = bch2_trans_do(c, NULL, NULL, + BCH_WATERMARK_btree| + BCH_TRANS_COMMIT_no_enospc, + bch2_clear_bucket_needs_discard(trans, bucket)); + bch_err_fn(c, ret); + + percpu_ref_put(&ca->io_ref); + discard_in_flight_remove(c, bucket); + + if (ret) + break; + } + + bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); +} + +static void bch2_discard_one_bucket_fast(struct bch_fs *c, struct bpos bucket) +{ + struct bch_dev *ca = bch_dev_bkey_exists(c, bucket.inode); + + if (!percpu_ref_is_dying(&ca->io_ref) && + !discard_in_flight_add(c, bucket) && + bch2_write_ref_tryget(c, BCH_WRITE_REF_discard_fast) && + !queue_work(c->write_ref_wq, &c->discard_fast_work)) + bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); +} + static int invalidate_one_bucket(struct btree_trans *trans, struct btree_iter *lru_iter, struct bkey_s_c lru_k, @@ -2215,9 +2342,16 @@ void bch2_dev_allocator_add(struct bch_fs *c, struct bch_dev *ca) set_bit(ca->dev_idx, c->rw_devs[i].d); } +void bch2_fs_allocator_background_exit(struct bch_fs *c) +{ + darray_exit(&c->discard_buckets_in_flight); +} + void bch2_fs_allocator_background_init(struct bch_fs *c) { spin_lock_init(&c->freelist_lock); + mutex_init(&c->discard_buckets_in_flight_lock); INIT_WORK(&c->discard_work, bch2_do_discards_work); + INIT_WORK(&c->discard_fast_work, bch2_do_discards_fast_work); INIT_WORK(&c->invalidate_work, bch2_do_invalidates_work); } diff --git a/fs/bcachefs/alloc_background.h b/fs/bcachefs/alloc_background.h index e7f7e842ee1b..052b2fac25d6 100644 --- a/fs/bcachefs/alloc_background.h +++ b/fs/bcachefs/alloc_background.h @@ -269,6 +269,7 @@ u64 bch2_min_rw_member_capacity(struct bch_fs *); void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *); void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *); +void bch2_fs_allocator_background_exit(struct bch_fs *); void bch2_fs_allocator_background_init(struct bch_fs *); #endif /* _BCACHEFS_ALLOC_BACKGROUND_H */ diff --git a/fs/bcachefs/bcachefs.h b/fs/bcachefs/bcachefs.h index 4d04e9c04dc3..13b8a16c18dc 100644 --- a/fs/bcachefs/bcachefs.h +++ b/fs/bcachefs/bcachefs.h @@ -708,6 +708,7 @@ struct btree_trans_buf { x(reflink) \ x(fallocate) \ x(discard) \ + x(discard_fast) \ x(invalidate) \ x(delete_dead_snapshots) \ x(snapshot_delete_pagecache) \ @@ -943,8 +944,11 @@ struct bch_fs { unsigned write_points_nr; struct buckets_waiting_for_journal buckets_waiting_for_journal; - struct work_struct discard_work; struct work_struct invalidate_work; + struct work_struct discard_work; + struct mutex discard_buckets_in_flight_lock; + DARRAY(struct bpos) discard_buckets_in_flight; + struct work_struct discard_fast_work; /* GARBAGE COLLECTION */ struct task_struct *gc_thread; |