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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-27 15:23:46 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-11-01 21:11:08 -0400 |
| commit | be9e782df3cb557715630a61dc79d9f966737859 (patch) | |
| tree | 68c77fe233bb9de8c3b3d9140e64e0ea152dfead /fs/bcachefs/btree_locking.h | |
| parent | 2e7acdfbcad8b60eeef29d3beb3eb9a7085e3768 (diff) | |
| download | lwn-be9e782df3cb557715630a61dc79d9f966737859.tar.gz lwn-be9e782df3cb557715630a61dc79d9f966737859.zip | |
bcachefs: Don't downgrade locks on transaction restart
We should only be downgrading locks on success - otherwise, our
transaction restarts won't be getting the correct locks and we'll
livelock.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_locking.h')
| -rw-r--r-- | fs/bcachefs/btree_locking.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/bcachefs/btree_locking.h b/fs/bcachefs/btree_locking.h index 6231e9ffc5d7..11b0a2c8cd69 100644 --- a/fs/bcachefs/btree_locking.h +++ b/fs/bcachefs/btree_locking.h @@ -355,26 +355,36 @@ static inline bool bch2_btree_node_relock_notrace(struct btree_trans *trans, /* upgrade */ + +struct get_locks_fail { + unsigned l; + struct btree *b; +}; + bool bch2_btree_path_upgrade_noupgrade_sibs(struct btree_trans *, - struct btree_path *, unsigned); + struct btree_path *, unsigned, + struct get_locks_fail *); + bool __bch2_btree_path_upgrade(struct btree_trans *, - struct btree_path *, unsigned); + struct btree_path *, unsigned, + struct get_locks_fail *); static inline int bch2_btree_path_upgrade(struct btree_trans *trans, struct btree_path *path, unsigned new_locks_want) { + struct get_locks_fail f; unsigned old_locks_want = path->locks_want; new_locks_want = min(new_locks_want, BTREE_MAX_DEPTH); if (path->locks_want < new_locks_want - ? __bch2_btree_path_upgrade(trans, path, new_locks_want) + ? __bch2_btree_path_upgrade(trans, path, new_locks_want, &f) : path->uptodate == BTREE_ITER_UPTODATE) return 0; trace_and_count(trans->c, trans_restart_upgrade, trans, _THIS_IP_, path, - old_locks_want, new_locks_want); + old_locks_want, new_locks_want, &f); return btree_trans_restart(trans, BCH_ERR_transaction_restart_upgrade); } |