Christoph Hellwig [off-list ref] 于2020年4月1日周三 上午12:33写道：

On Wed, Apr 01, 2020 at 12:31:17AM +0800, Weiping Zhang wrote:

quoted

Would you like to share more detail about why NVMe WRR is broken?

Because it only weights command fetching.  It says absolutely nothing
about command execution.

I know that different ssd vendor may have different implementation,
even some device can work well, seems you have no plan support it.
I drop this patchset.

@Tejun Heo  @Keith Busch
Thanks all of you