On Fri, Jan 12, 2018 at 07:04:28PM +, Bart Van Assche wrote:
> On Thu, 2018-01-11 at 14:01 +0800, Ming Lei wrote:
> > diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
> > index 86bf502a8e51..fcddf5a62581 100644
> > --- a/drivers/md/dm-mpath.c
> > +++ b/drivers/md/dm-mpath.c
> > @@
On Thu, 2018-01-11 at 14:01 +0800, Ming Lei wrote:
> diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
> index 86bf502a8e51..fcddf5a62581 100644
> --- a/drivers/md/dm-mpath.c
> +++ b/drivers/md/dm-mpath.c
> @@ -533,8 +533,20 @@ static int multipath_clone_and_map(struct dm_target *ti,
>
blk-mq will rerun queue via RESTART or dispatch wake after one request
is completed, so not necessary to wait random time for requeuing, we
should trust blk-mq to do it.
More importantly, we need return BLK_STS_RESOURCE to blk-mq so that
dequeue from I/O scheduler can be stopped, then I/O merge
