[RFC PATCH] nvme: add an opt-in to use AWUPF

[Keith Busch]

On Wed, Aug 20, 2025 at 03:02:20PM +0000, John Garry wrote:
> It would be preferred to stop honouring AWUPF altogether, but this may
> needlessly disable atomic write support for many "good" devices which
> only specify AWUPF. Currently all validation of controller-related
> atomics limits is dropped.

These "good" devices that only report AWUPF, is there some set of
characteristics that generally applies to all of them? I tried to list
out conditions for when I think the value could be counted on here:

  https://lore.kernel.org/linux-nvme/aGvuRS8VmC0JXAR3@kbusch-mbp/

I just don't know if you know of any devices where that criteria doesn't
git. If not, maybe we can work with that without introducing more user
knobs.