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Date:      Sun, 9 Dec 2018 15:50:52 -0800
From:      Chuck Tuffli <chuck@freebsd.org>
To:        yuripv@yuripv.net
Cc:        freebsd-current@freebsd.org
Subject:   Re: nda(4) does not work (reliably) in VMware Workstation
Message-ID:  <CAKAYmM%2Bg9Hd2wy_qizFGPEKyqYUyseXFY5jmPbxydHq6aiYK=w@mail.gmail.com>
In-Reply-To: <9db60b9c-fea0-c5d6-5f8f-eae051c3f92d@yuripv.net>
References:  <015e28d3-3c6f-b5f3-b41a-5f6d367dddbb@yuripv.net> <CAKAYmM%2BRqymn0DXD6O43GFGMMsh790gDT95c3oQX43iaYFXVBA@mail.gmail.com> <9db60b9c-fea0-c5d6-5f8f-eae051c3f92d@yuripv.net>

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On Sun, Dec 9, 2018 at 3:43 PM Yuri Pankov <yuripv@yuripv.net> wrote:

> Chuck Tuffli wrote:
> > On Sat, Dec 8, 2018 at 12:28 PM Yuri Pankov <yuripv@yuripv.net
> > <mailto:yuripv@yuripv.net>> wrote:
> >
> >     Hi,
> >
> >     Running -HEAD in VMware Workstation 15.0.2 VM.  Trying to use nda(4)
> >     instead of nvd(4) shows the following list of errors, and eventually
> >     panics:
> >
> >     https://people.freebsd.org/~yuripv/nda1.png
> >     https://people.freebsd.org/~yuripv/nda2.png
> >
> >     nvd(4) works without issues in this VM.  nda(4) works as well in
> VMware
> >     ESXi VMs.  Is this a problem with WS NVMe emulation?
> >
> >
> > Since I don't have access to ESXi, the attached is a speculative fix. If
> > it works, I'll clean this up a bit and get it committed. If not, please
> > post the output from:
> > nvmecontrol identtify nvme0
>
> Thank you, it seems to help (was seeing the issue previously immediately
> after boot).  BTW, the ESXi VM works fine with nda, it's only the
> Workstation that had the problem.  Comparing `nvmecontrol identify`
> output from both, the only difference is (first is WS, second is ESXi):
>
> -Dataset Management Command:  Not Supported
> +Dataset Management Command:  Supported
>

OK, that makes sense given the error message and the patch working. I'll
get this cleaned up and committed. Thanks for the report!

--chuck



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