On Mon, Aug 21, 2023 at 05:56:02PM +0800, chengming.zhou@xxxxxxxxx wrote: > From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> > > Just like blk_mq_alloc_tag_set(), it's better to prepare all tags before > using to map to queue ctxs in blk_mq_map_swqueue(), which now have to > consider empty set->tags[]. > > The good point is that we can fallback easily if increasing nr_hw_queues > fail, instead of just mapping to hctx[0] when fail in blk_mq_map_swqueue(). > > And the fallback path already has tags free & clean handling, so all > is good. > > Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx> -- Ming
