diff options
Diffstat (limited to 'fs/bcachefs/btree_journal_iter.c')
| -rw-r--r-- | fs/bcachefs/btree_journal_iter.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_journal_iter.c b/fs/bcachefs/btree_journal_iter.c index fa907293ba43..b7ac93c8fdd8 100644 --- a/fs/bcachefs/btree_journal_iter.c +++ b/fs/bcachefs/btree_journal_iter.c @@ -1,7 +1,9 @@ // SPDX-License-Identifier: GPL-2.0 #include "bcachefs.h" +#include "bkey_buf.h" #include "bset.h" +#include "btree_cache.h" #include "btree_journal_iter.h" #include "journal_io.h" @@ -334,9 +336,38 @@ void bch2_btree_and_journal_iter_advance(struct btree_and_journal_iter *iter) iter->pos = bpos_successor(iter->pos); } +static void btree_and_journal_iter_prefetch(struct btree_and_journal_iter *_iter) +{ + struct btree_and_journal_iter iter = *_iter; + struct bch_fs *c = iter.trans->c; + unsigned level = iter.journal.level; + struct bkey_buf tmp; + unsigned nr = test_bit(BCH_FS_started, &c->flags) + ? (level > 1 ? 0 : 2) + : (level > 1 ? 1 : 16); + + iter.prefetch = false; + bch2_bkey_buf_init(&tmp); + + while (nr--) { + bch2_btree_and_journal_iter_advance(&iter); + struct bkey_s_c k = bch2_btree_and_journal_iter_peek(&iter); + if (!k.k) + break; + + bch2_bkey_buf_reassemble(&tmp, c, k); + bch2_btree_node_prefetch(iter.trans, NULL, tmp.k, iter.journal.btree_id, level - 1); + } + + bch2_bkey_buf_exit(&tmp, c); +} + struct bkey_s_c bch2_btree_and_journal_iter_peek(struct btree_and_journal_iter *iter) { struct bkey_s_c btree_k, journal_k, ret; + + if (iter->prefetch && iter->journal.level) + btree_and_journal_iter_prefetch(iter); again: if (iter->at_end) return bkey_s_c_null; |