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bcachefs: Make more btree_paths available

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- Don't decrease BTREE_ITER_MAX when building with CONFIG_LOCKDEP
   anymore. The lockdep table sizes are configurable now, we don't need
   this anymore.
 - btree_trans_too_many_iters() is less conservative now. Previously it
   was causing a transaction restart if we had used more than
   BTREE_ITER_MAX / 2 paths, change this to BTREE_ITER_MAX - 8.

This helps with excessive transaction restarts/livelocks in the bucket
allocator path.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-08-27 10:30:36 -04:00
parent 06a5394322
commit b1cdc398ae
1 changed files with 1 additions and 1 deletions
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2
fs/bcachefs/btree_iter.h
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@ -387,7 +387,7 @@ static inline struct bkey_s_c bch2_btree_iter_peek_upto_type(struct btree_iter *
static inline int btree_trans_too_many_iters(struct btree_trans *trans)
{
if (hweight64(trans->paths_allocated) > BTREE_ITER_MAX / 2) {
if (hweight64(trans->paths_allocated) > BTREE_ITER_MAX - 8) {
trace_trans_restart_too_many_iters(trans, _THIS_IP_);
return btree_trans_restart(trans, BCH_ERR_transaction_restart_too_many_iters);
}