fix atomic limits check

[Christoph Hellwig]

On Tue, Jun 17, 2025 at 10:40:35AM -0700, alan.adamson at oracle.com wrote:
> I changed the config a bit:
>
> CTRL 0 - AWUN=31 AWUPF=15
> CTRL 1 - AWUN=31 AWUPF=31
> CTRL 2 - AWUN=15 AWUPF=7
> CTRL 3 - AWUN=15 AWUPF=15
>     NS - NAWUN=31 NAWUPF=15
>     NS - NAWUN=127 NAWUPF=63

I'm a bit confused what this config means.  The NS lines here are
multiple namespaces?

> [root at localhost ~]# sh testxx.sh nvme0n3

But this is all about the controller 0 above, which now has multiple
namespaces?

> + cat /sys/block/nvme0n3/queue/atomic_write_max_bytes
> 8192
> [root at localhost ~]# dmesg | grep -i awupf
> [root at localhost ~]#
>
> AWUPF of 7 isn't consistent with an atomic_write_max_bytes of 8192.

It is consistent with an (N)AWUPF=15, and it is namespace number 3.  Are
you testing controller 3 above or is the namespace shared between
controller 0 and controller 3?