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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-26 01:04:46 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:10:06 +0300 |
| commit | f26c67f4a7c4951a312547790b11066bc510822e (patch) | |
| tree | a5f23a05f9a59dce45ffd1e9e354f73bd7279a2d /fs/bcachefs/btree_iter.h | |
| parent | 065bd3356ce490ae9454d8b3c98ff298e13d09ac (diff) | |
| download | linux-f26c67f4a7c4951a312547790b11066bc510822e.tar.xz | |
bcachefs: Snapshot depth, skiplist fields
This extents KEY_TYPE_snapshot to include some new fields:
- depth, to indicate depth of this particular node from the root
- skip[3], skiplist entries for quickly walking back up to the root
These are to improve bch2_snapshot_is_ancestor(), making it O(ln(n))
instead of O(n) in the snapshot tree depth.
Skiplist nodes are picked at random from the set of ancestor nodes, not
some fixed fraction.
This introduces bcachefs_metadata_version 1.1, snapshot_skiplists.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_iter.h')
| -rw-r--r-- | fs/bcachefs/btree_iter.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_iter.h b/fs/bcachefs/btree_iter.h index 63260f68bc67..13e92452270e 100644 --- a/fs/bcachefs/btree_iter.h +++ b/fs/bcachefs/btree_iter.h @@ -795,6 +795,14 @@ __bch2_btree_iter_peek_upto_and_restart(struct btree_trans *trans, (_do) ?: bch2_trans_commit(_trans, (_disk_res),\ (_journal_seq), (_commit_flags))) +#define for_each_btree_key_reverse_commit(_trans, _iter, _btree_id, \ + _start, _iter_flags, _k, \ + _disk_res, _journal_seq, _commit_flags,\ + _do) \ + for_each_btree_key_reverse(_trans, _iter, _btree_id, _start, _iter_flags, _k,\ + (_do) ?: bch2_trans_commit(_trans, (_disk_res),\ + (_journal_seq), (_commit_flags))) + #define for_each_btree_key_upto_commit(_trans, _iter, _btree_id, \ _start, _end, _iter_flags, _k, \ _disk_res, _journal_seq, _commit_flags,\ |