On Thu, Mar 10, 2022 at 06:10:08PM +0530, Kanchan Joshi wrote: > On Thu, Mar 10, 2022 at 2:04 PM Christoph Hellwig <hch@xxxxxx> wrote: > > > > On Tue, Mar 08, 2022 at 08:50:58PM +0530, Kanchan Joshi wrote: > > > From: Jens Axboe <axboe@xxxxxxxxx> > > > > > > Add support to use plugging if it is enabled, else use default path. > > > > The subject and this comment don't really explain what is done, and > > also don't mention at all why it is done. > > Missed out, will fix up. But plugging gave a very good hike to IOPS. But how does plugging improve IOPS here for passthrough request? Not see plug->nr_ios is wired to data.nr_tags in blk_mq_alloc_request(), which is called by nvme_submit_user_cmd(). Thanks, Ming
