Re: [PATCH 01/12] blk-mq: do not include passthrough requests in I/O accounting

[Christoph Hellwig <hch@xxxxxx>]

On Wed, Feb 23, 2022 at 10:08:20AM +0800, Ming Lei wrote:
> > -	return (rq->rq_flags & RQF_IO_STAT) && rq->q->disk;
> > +	return (rq->rq_flags & RQF_IO_STAT) && !blk_rq_is_passthrough(rq);
> 
> I guess this way may cause regression for workloads with lots of userspace IO
> from user viewpoint?

I'd say it fixes it as the accounting right now is completely bogus.