}
static struct bkey_cached *
-btree_key_cache_create(struct btree_key_cache *c,
+btree_key_cache_create(struct bch_fs *c,
enum btree_id btree_id,
struct bpos pos)
{
+ struct btree_key_cache *bc = &c->btree_key_cache;
struct bkey_cached *ck;
bool was_new = true;
- ck = bkey_cached_alloc(c);
+ ck = bkey_cached_alloc(bc);
if (unlikely(!ck)) {
- ck = bkey_cached_reuse(c);
- if (unlikely(!ck))
+ ck = bkey_cached_reuse(bc);
+ if (unlikely(!ck)) {
+ bch_err(c, "error allocating memory for key cache item, btree %s",
+ bch2_btree_ids[btree_id]);
return ERR_PTR(-ENOMEM);
+ }
was_new = false;
+ } else {
+ if (btree_id == BTREE_ID_subvolumes)
+ six_lock_pcpu_alloc(&ck->c.lock);
+ else
+ six_lock_pcpu_free(&ck->c.lock);
}
ck->c.level = 0;
ck->valid = false;
ck->flags = 1U << BKEY_CACHED_ACCESSED;
- if (unlikely(rhashtable_lookup_insert_fast(&c->table,
+ if (unlikely(rhashtable_lookup_insert_fast(&bc->table,
&ck->hash,
bch2_btree_key_cache_params))) {
/* We raced with another fill: */
six_unlock_intent(&ck->c.lock);
kfree(ck);
} else {
- mutex_lock(&c->lock);
- bkey_cached_free(c, ck);
- mutex_unlock(&c->lock);
+ mutex_lock(&bc->lock);
+ bkey_cached_free(bc, ck);
+ mutex_unlock(&bc->lock);
}
return NULL;
}
- atomic_long_inc(&c->nr_keys);
+ atomic_long_inc(&bc->nr_keys);
six_unlock_write(&ck->c.lock);
struct btree_path *ck_path,
struct bkey_cached *ck)
{
- struct btree_iter iter;
+ struct btree_path *path;
struct bkey_s_c k;
unsigned new_u64s = 0;
struct bkey_i *new_k = NULL;
+ struct bkey u;
int ret;
- bch2_trans_iter_init(trans, &iter, ck->key.btree_id,
- ck->key.pos, BTREE_ITER_SLOTS);
- k = bch2_btree_iter_peek_slot(&iter);
- ret = bkey_err(k);
+ path = bch2_path_get(trans, ck->key.btree_id,
+ ck->key.pos, 0, 0, 0, _THIS_IP_);
+ ret = bch2_btree_path_traverse(trans, path, 0);
if (ret)
goto err;
+ k = bch2_btree_path_peek_slot(path, &u);
+
if (!bch2_btree_node_relock(trans, ck_path, 0)) {
- trace_transaction_restart_ip(trans->ip, _THIS_IP_);
+ trace_trans_restart_relock_key_cache_fill(trans->fn,
+ _THIS_IP_, ck_path->btree_id, &ck_path->pos);
ret = btree_trans_restart(trans);
goto err;
}
*/
new_u64s = k.k->u64s + 1;
+ /*
+ * Allocate some extra space so that the transaction commit path is less
+ * likely to have to reallocate, since that requires a transaction
+ * restart:
+ */
+ new_u64s = min(256U, (new_u64s * 3) / 2);
+
if (new_u64s > ck->u64s) {
new_u64s = roundup_pow_of_two(new_u64s);
new_k = kmalloc(new_u64s * sizeof(u64), GFP_NOFS);
if (!new_k) {
+ bch_err(trans->c, "error allocating memory for key cache key, btree %s u64s %u",
+ bch2_btree_ids[ck->key.btree_id], new_u64s);
ret = -ENOMEM;
goto err;
}
bch2_btree_node_unlock_write(trans, ck_path, ck_path->l[0].b);
/* We're not likely to need this iterator again: */
- set_btree_iter_dontneed(&iter);
+ path->preserve = false;
err:
- bch2_trans_iter_exit(trans, &iter);
+ bch2_path_put(trans, path, 0);
return ret;
}
return 0;
}
- ck = btree_key_cache_create(&c->btree_key_cache,
- path->btree_id, path->pos);
+ ck = btree_key_cache_create(c, path->btree_id, path->pos);
ret = PTR_ERR_OR_ZERO(ck);
if (ret)
goto err;
if (!trans->restarted)
goto retry;
- trace_transaction_restart_ip(trans->ip, _THIS_IP_);
ret = -EINTR;
goto err;
}
if (!ck->valid && !(flags & BTREE_ITER_CACHED_NOFILL)) {
if (!path->locks_want &&
!__bch2_btree_path_upgrade(trans, path, 1)) {
- trace_transaction_restart_ip(trans->ip, _THIS_IP_);
+ trace_transaction_restart_ip(trans->fn, _THIS_IP_);
ret = btree_trans_restart(trans);
goto err;
}
bch2_trans_iter_init(trans, &b_iter, key.btree_id, key.pos,
BTREE_ITER_SLOTS|
- BTREE_ITER_INTENT);
+ BTREE_ITER_INTENT|
+ BTREE_ITER_ALL_SNAPSHOTS);
bch2_trans_iter_init(trans, &c_iter, key.btree_id, key.pos,
BTREE_ITER_CACHED|
BTREE_ITER_CACHED_NOFILL|
BTREE_ITER_CACHED_NOCREATE|
BTREE_ITER_INTENT);
+ b_iter.flags &= ~BTREE_ITER_WITH_KEY_CACHE;
+
ret = bch2_btree_iter_traverse(&c_iter);
if (ret)
goto out;
ck = (void *) c_iter.path->l[0].b;
- if (!ck ||
- (journal_seq && ck->journal.seq != journal_seq))
+ if (!ck)
goto out;
if (!test_bit(BKEY_CACHED_DIRTY, &ck->flags)) {
- if (!evict)
- goto out;
- goto evict;
+ if (evict)
+ goto evict;
+ goto out;
}
+ BUG_ON(!ck->valid);
+
+ if (journal_seq && ck->journal.seq != journal_seq)
+ goto out;
+
/*
* Since journal reclaim depends on us making progress here, and the
* allocator/copygc depend on journal reclaim making progress, we need
* */
ret = bch2_btree_iter_traverse(&b_iter) ?:
bch2_trans_update(trans, &b_iter, ck->k,
+ BTREE_UPDATE_KEY_CACHE_RECLAIM|
BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
BTREE_TRIGGER_NORUN) ?:
bch2_trans_commit(trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_USE_RESERVE|
(ck->journal.seq == journal_last_seq(j)
- ? BTREE_INSERT_JOURNAL_RESERVED
+ ? JOURNAL_WATERMARK_reserved
: 0)|
commit_flags);
if (ret) {
return true;
}
-#ifdef CONFIG_BCACHEFS_DEBUG
-void bch2_btree_key_cache_verify_clean(struct btree_trans *trans,
- enum btree_id id, struct bpos pos)
-{
- BUG_ON(bch2_btree_key_cache_find(trans->c, id, pos));
-}
-#endif
-
static unsigned long bch2_btree_key_cache_scan(struct shrinker *shrink,
struct shrink_control *sc)
{
rcu_read_lock();
tbl = rht_dereference_rcu(bc->table.tbl, &bc->table);
- for (i = 0; i < tbl->size; i++)
- rht_for_each_entry_rcu(ck, pos, tbl, i, hash) {
- bkey_cached_evict(bc, ck);
- list_add(&ck->list, &bc->freed);
- }
+ if (tbl)
+ for (i = 0; i < tbl->size; i++)
+ rht_for_each_entry_rcu(ck, pos, tbl, i, hash) {
+ bkey_cached_evict(bc, ck);
+ list_add(&ck->list, &bc->freed);
+ }
rcu_read_unlock();
list_for_each_entry_safe(ck, n, &bc->freed, list) {
void bch2_btree_key_cache_to_text(struct printbuf *out, struct btree_key_cache *c)
{
pr_buf(out, "nr_freed:\t%zu\n", c->nr_freed);
- pr_buf(out, "nr_keys:\t%zu\n", atomic_long_read(&c->nr_keys));
- pr_buf(out, "nr_dirty:\t%zu\n", atomic_long_read(&c->nr_dirty));
+ pr_buf(out, "nr_keys:\t%lu\n", atomic_long_read(&c->nr_keys));
+ pr_buf(out, "nr_dirty:\t%lu\n", atomic_long_read(&c->nr_dirty));
}
void bch2_btree_key_cache_exit(void)
projects / bcachefs-tools-debian / blobdiff