On Sun, Apr 08, 2018 at 05:48:12PM +0800, Ming Lei wrote: > There are several reasons for removing the check: > > 1) blk_mq_hw_queue_mapped() returns true always now since each hctx > may be mapped by one CPU at least Sounds like we should remove it, then.. The patch looks good: Reviewed-by: Christoph Hellwig <hch@xxxxxx>