On 10/13/21 11:22 AM, Christoph Hellwig wrote: > On Wed, Oct 13, 2021 at 10:49:35AM -0600, Jens Axboe wrote: >> If we don't use an IO scheduler or have shared tags, then we don't need >> to call into this external function at all. This saves ~2% for such >> a setup. > > Hmm. What happens if you just throw an inline tag onto > blk_mq_get_driver_tag? I'd be surprised if that's any different than my patch in terms of performance, the fast path would be about the same. I don't feel strongly about it, can do that instead. -- Jens Axboe
