On Thu, Apr 09, 2020 at 09:44:06AM +0800, Ming Lei wrote: > Almost all __blk_mq_end_request() follow blk_update_request(), so the > completed bytes can be passed to __blk_mq_end_request(), then we can > avoid to introduce this field. But on some drivers blk_update_request() may be called multiple times before __blk_mq_end_request() is called and what's needed here is the total number of bytes in the whole request, not just in the final completion. > Also there is just 20 callers of __blk_mq_end_request(), looks this kind > of change shouldn't be too big. This would work iff we get rid of partial completions and if we get rid of partial completions, we might as well stop exposing blk_update_request() and __blk_mq_end_request(). Thanks. -- tejun
