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bcachefs: bch2_path_get() reuses paths if upgrade_fails & !should_be_locked

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Small additional optimization over the previous patch, bringing us
closer to the original behaviour, except when we need to clone to avoid
a transaction restart.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2025-05-22 18:12:54 -04:00
parent aac49471b6
commit be9fecdcda
1 changed files with 7 additions and 2 deletions
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9
fs/bcachefs/btree_locking.c
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@@ -628,8 +628,13 @@ bool __bch2_btree_path_upgrade_norestart(struct btree_trans *trans,
{
path->locks_want = new_locks_want;
struct get_locks_fail f = {};
bool ret = !btree_path_get_locks(trans, path, true, &f, 0);
/*
* If we need it locked, we can't touch it. Otherwise, we can return
* success - bch2_path_get() will use this path, and it'll just be
* retraversed:
*/
bool ret = !btree_path_get_locks(trans, path, true, NULL, 0) ||
!path->should_be_locked;
bch2_btree_path_verify_locks(path);
return ret;