bcachefs: New data structure for buckets waiting on journal commit

Implement a hash table, using cuckoo hashing, for empty buckets that are
waiting on a journal commit before they can be reused.

This replaces the journal_seq field of bucket_mark, and is part of
eventually getting rid of the in memory bucket array.

We may need to make bch2_bucket_needs_journal_commit() lockless, pending
profiling and testing.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/fs/bcachefs/buckets_types.h b/fs/bcachefs/buckets_types.h
index 18bca269b750..24139831226d 100644
--- a/fs/bcachefs/buckets_types.h
+++ b/fs/bcachefs/buckets_types.h
@@ -15,18 +15,9 @@ struct bucket_mark {
 	u8		gen;
 	u8		data_type:3,
 			owned_by_allocator:1,
-			journal_seq_valid:1,
 			stripe:1;
 	u16		dirty_sectors;
 	u16		cached_sectors;
-
-	/*
-	 * low bits of journal sequence number when this bucket was most
-	 * recently modified: if journal_seq_valid is set, this bucket can't be
-	 * reused until the journal sequence number written to disk is >= the
-	 * bucket's journal sequence number:
-	 */
-	u16		journal_seq;
 	};
 	};
 };