tree ad2684705043592489c8a960423419bc6167fb0e
parent 88a2ee918c422809f0fbbe030dd0525c5600e9cd
author Mike Snitzer <snitzer@redhat.com> 1513533421 -0500
committer Mike Snitzer <snitzer@redhat.com> 1513740961 -0500

dm mpath: skip calls to end_io_bio if using NVMe bio-based and round-robin

Add a 'skip_endio_hook' flag member to 'struct dm_target' that if set
instructs calls to .end_io (or .rq_end_io) to be skipped.

NVMe bio-based doesn't use multipath_end_io_bio() for anything other
than updating the path-selector.  So it can be avoided completely if the
round-robin path selector is used (because round-robin doesn't have an
end_io hook).

Signed-off-by: Mike Snitzer <snitzer@redhat.com>