[PATCH 0/5] bcachefs: write buffer journaling fixes

[Brian Foster <bfoster@redhat.com>]

Hi all,

Here are a few patches to try and address the write buffer journaling
issue that occasionally produces backpointer inconsistency errors via
generic/388. The issue is described in more detail in patch 5.

Patches 1-3 are just a few cleanup/prep patches that fell out of
perusing the code. Patch 4 adds the ability to plumb a known seq for a
journaled key into a transaction and down through to the btree update.
Patch 5 updates write buffer key flushing to use the wb key journal seq
for the key in the flush transaction.

This survived ~100 or so iterations of generic/388 in my last test and
the series is also pushed to the CI [1]. Thoughts, reviews, flames
appreciated.

Brian

[1] https://evilpiepirate.org/~testdashboard/ci?branch=bfoster&commit=130f60a69f0c2cce14ac5c0de6257b4a4cae39f0

Brian Foster (5):
  bcachefs: remove duplicate code between backpointer update paths
  bcachefs: remove unnecessary btree_insert_key_leaf() wrapper
  bcachefs: fold bch2_trans_update_by_path_trace() into callers
  bcachefs: support btree updates of prejournaled keys
  bcachefs: use prejournaled key updates for write buffer flushes

 fs/bcachefs/backpointers.c       | 18 +--------
 fs/bcachefs/backpointers.h       |  8 ++--
 fs/bcachefs/bkey_methods.h       |  2 +
 fs/bcachefs/btree_types.h        |  1 +
 fs/bcachefs/btree_update.h       |  2 +
 fs/bcachefs/btree_update_leaf.c  | 67 +++++++++++++++++++-------------
 fs/bcachefs/btree_write_buffer.c | 30 +++++++++++++-
 7 files changed, 77 insertions(+), 51 deletions(-)

-- 
2.40.1