On 9/23/22 9:16 AM, Christoph Hellwig wrote: > On Thu, Sep 22, 2022 at 12:28:00PM -0600, Jens Axboe wrote: >> This is good for a 10% improvement for passthrough performance. For >> a non-drive limited test case, passthrough IO is now more efficient >> than the regular bdev O_DIRECT path. > > How so? If it ends up faster we are doing something wrong in the > normal path as there should be no fundamental difference in the work > that is being done. There's no fundamental difference, but the bdev path is more involved than the simple passthrough path. -- Jens Axboe
