On Wed, Jun 28, 2017 at 09:56:59PM -0600, Edmund Nadolski wrote:
> Commit afce772e87c3 ("btrfs: fix check_shared for fiemap ioctl") added
> the ref_tree code in backref.c to reduce backref searching for
> shared extents under the FIEMAP ioctl. This code will not be
> compatible with the upcoming rbtree changes for improved backref
> searching, so this patch removes the ref_tree code. The rbtree
> changes will provide the equivalent functionality for FIEMAP.
>
> The above commit also introduced transaction semantics around calls to
> btrfs_check_shared() in order to accurately account for delayed refs.
> This functionality needs to be retained, so a complete revert of the
> above commit is not desirable. This patch therefore removes the
> ref_tree portion of the commit as above, however it does not remove
> the transaction portion.
>
> Signed-off-by: Edmund Nadolski <enadolski@xxxxxxxx>
> Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
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