Re: [PATCH 1/2] hw/nvme: Implement shadow doorbell buffer support

[Keith Busch]

On Wed, Jun 08, 2022 at 10:55:30PM +0200, Klaus Jensen wrote:
> 
> Keith, is this a bug in the kernel? If the code here would expect the
> doorbell buffer to be updated for the admin queue as well, would we
> break?

The admin queue has to be created before db buffer can be set up, so we can't
rely on it. And this is a performance feature. Admin commands have never been
considered performant, so we decided not to consider it though the spec allows
it.