[PATCH 0/2] btrfs: fixes for buffered write qgroup rsv leaks

[Boris Burkov <boris@bur.io>]

generic/475 exposes qgroup rsv leaks under EIO errors. These are fixes
for two classes of buffered write errors we are still hitting:
1. dirty pages leaked during an aborted transaction
2. dirty pages getting un-dirtied and leaked by cow_file_range when it
   doesn't make an ordered extent for a range.

After these two fixes, I was able to run generic/475 with squota enabled
at mkfs 100 times in a row without an error, and a modified generic/475
that always sleeps for 0 seconds 500 times.

Boris Burkov (2):
  btrfs: implement launder_folio for clearing dirty page rsv
  btrfs: fix qgroup rsv leaks in cow_file_range

 fs/btrfs/inode.c | 9 +++++++++
 1 file changed, 9 insertions(+)

-- 
2.45.2