Re: [PATCH 0/8] Locking cleanups and lockdep fix

[David Sterba <dsterba@suse.cz>]

On Fri, Nov 06, 2020 at 04:27:28PM -0500, Josef Bacik wrote:
> Hello,
> 
> Filipe reported a lockdep splat that he hit on btrfs/187, but honestly could be
> hit anywhere we do readdir on a sufficiently large fs.  Fixing this is fairly
> straightforward, but enabled me to do a lot of extra cleanups, especially now
> that my other locking fixes have been merged.  The first two patches are to
> address the lockdep problem.  The followup patches are cleaning out the
> recursive locking support, which we no longer require.  I would have separated
> this work, but btrfs_next_old_leaf was a heavy user of this, so it would be
> annoying to take separately, hence putting it all together.  Thanks,
> 
> Josef
> 
> Josef Bacik (8):
>   btrfs: cleanup the locking in btrfs_next_old_leaf
>   btrfs: unlock to current level in btrfs_next_old_leaf
>   btrfs: kill path->recurse
>   btrfs: remove the recursion handling code in locking.c
>   btrfs: remove __btrfs_read_lock_root_node
>   btrfs: use btrfs_tree_read_lock in btrfs_search_slot
>   btrfs: remove the recurse parameter from __btrfs_tree_read_lock
>   btrfs: remove ->recursed from extent_buffer

Added to misc-next, with some minor updates in changelogs. Seems that
this should remove all leftovers after the locking switch.