On Wed, Oct 13, 2021 at 09:57:13AM +0100, Pavel Begunkov wrote: > We already have a blk_mq_need_time_stamp() check in > __blk_mq_end_request() to get a timestamp, hide all the statistics > accounting under it. It cuts some cycles for requests that don't need > stats, and is free otherwise. The transformation is a little non-obvious due to the checks hidden inblk_mq_need_time_stamp, but after following all the spaghetti it does looks like a correct transformation: Reviewed-by: Christoph Hellwig <hch@xxxxxx>
