diff options
Diffstat (limited to 'libbcachefs/btree_update_leaf.c')
| -rw-r--r-- | libbcachefs/btree_update_leaf.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/libbcachefs/btree_update_leaf.c b/libbcachefs/btree_update_leaf.c index e7816afe..64734f91 100644 --- a/libbcachefs/btree_update_leaf.c +++ b/libbcachefs/btree_update_leaf.c @@ -508,6 +508,10 @@ static inline int do_bch2_trans_commit(struct btree_trans *trans, /* * Can't be holding any read locks when we go to take write locks: + * another thread could be holding an intent lock on the same node we + * have a read lock on, and it'll block trying to take a write lock + * (because we hold a read lock) and it could be blocking us by holding + * its own read lock (while we're trying to to take write locks). * * note - this must be done after bch2_trans_journal_preres_get_cold() * or anything else that might call bch2_trans_relock(), since that @@ -515,9 +519,15 @@ static inline int do_bch2_trans_commit(struct btree_trans *trans, */ trans_for_each_iter(trans, iter) { if (iter->nodes_locked != iter->nodes_intent_locked) { - EBUG_ON(iter->flags & BTREE_ITER_KEEP_UNTIL_COMMIT); - EBUG_ON(trans->iters_live & (1ULL << iter->idx)); - bch2_btree_iter_unlock_noinline(iter); + if ((iter->flags & BTREE_ITER_KEEP_UNTIL_COMMIT) || + (trans->iters_live & (1ULL << iter->idx))) { + if (!bch2_btree_iter_upgrade(iter, 1)) { + trace_trans_restart_upgrade(trans->ip); + return -EINTR; + } + } else { + bch2_btree_iter_unlock_noinline(iter); + } } } |