[dm-devel] [PATCH 5/5] dm thin: unroll issue_discard() to create longer discard bio chains

[Christoph Hellwig]

On Fri, May 06, 2016 at 05:36:58PM +0100, Joe Thornber wrote:
> But the plugging and error handling are called from two places.
> process_prepared_discard_passdown() and
> passdown_double_checking_shared_status().

passdown_double_checking_shared_status is only called from
process_prepared_discard_passdown.  So the blk_start_plug from
begin_discard and the work in end_discard could be moved into
it trivially.