[PATCH v2 0/2] btrfs: fix deadlock with fsync and full sync

[Josef Bacik <josef@toxicpanda.com>]

v1->v2:
- Make btrfs_sync_file also use the new BTRFS_LOG_FORCE_COMMIT define.
- Adjust the title of the second patch

--- Original email ---
Hello,

We've hit a pretty convoluted deadlock in production that Omar tracked down with
drgn.  I've described the deadlock in the second patch, but generally it's a
lock inversion where we have an existing dependency of extent lock ->
transaction, but in fsync in a few cases we can end up with transaction ->
extent lock, and the expected hilarity ensues.  Thanks,

Josef

Josef Bacik (2):
  btrfs: make the return value for log syncing consistent
  btrfs: fix deadlock with fsync+fiemap+transaction commit

 fs/btrfs/file.c     | 69 ++++++++++++++++++++++++++++++++++-----------
 fs/btrfs/tree-log.c | 18 ++++++------
 fs/btrfs/tree-log.h |  3 ++
 3 files changed, 65 insertions(+), 25 deletions(-)

-- 
2.26.3