[Bug 211713] NVME controller failure: resetting (Samsung SM961 SSD Drives)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713

Wolf Noble <freebsd at wolfspaw.com> changed:

           What    |Removed                     |Added
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                 CC|                            |freebsd at wolfspaw.com

--- Comment #69 from Wolf Noble <freebsd at wolfspaw.com> ---
I can confirm this bug rears it head on a dell r510 running freenas11.2 (which
follows freebsd11.2)    
if I use a synology m2d18 https://www.synology.com/en-us/products/M2D18  dual
NVME pci card. I cannot get diskinfo to run cleanly without the target going to
lunch. Setting hw.nvme.enable_aborts=1 via a loader.conf tunable (and
rebooting) had no impact in my case.

disabling or enabling hyperthreading does not seem to impact this hang,
although having hyperthreading enabled seems to prevent MSIX from being used.

if I take the nvme devices out of the synology dual card and put them into a
single nvme->pci adapter, I do not (yet) seem to have the problem.

happy to provide whatever details might be useful in making progress, but
figured that just the additional info might be sufficiently useful without
superfluous noise.

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