Re: nvme INVALID_FIELD in dmesg.boot

From: Chuck Tuffli <chuck_at_freebsd.org>
Date: Wed, 25 May 2022 16:19:04 UTC 
On Wed, May 25, 2022 at 6:59 AM Alexander Motin <mav@freebsd.org> wrote:
...
> > nvme0: SET FEATURES (09) sqid:0 cid:15 nsid:0 cdw10:0000000b cdw11:0000031f
> > nvme0: INVALID_FIELD (00/02) sqid:0 cid:15 cdw0:0
...
> Those messages mean that driver tried to enable certain types of
> asynchronous events, but probably the hardware does not support some of

Du-oh! I read the 'b' in 0000000b as 'binary'. Alexander and Warner
are correct that this is from setting an AEN, and I was wrong about
CDW10 causing the error.

FWIW, "CDW" in NVMe-land is shorthand for Command DWord as NVMe
commands are composed of 32-bit fields (ancient Intel/Microsoft
"double words").