Anyone else seeing hangs at "Trying to mount root" after recent commits?

[John Kennedy]

On Wed, Sep 11, 2019 at 01:38:14AM -0700, Jack L. wrote:
> Yes, I upgraded 2 systems and both experience the same behavior
> Dell R610 and Dell 7010 here. Afraid to upgrade any others

  For what it's worth, I have a Dell Optiplex 9020 booting r352118:

	FreeBSD FreeBSD 12.1-PRERELEASE #105 r352118+b6945c1f5542(stable/12)

  That's at least after r352025, which may help your bisect.  Currently
crunching r352202.  I boot off of ZFS (vs UFS), but that might be another
data point for someone.

> On Tue, Sep 10, 2019 at 8:25 PM Terry Kennedy <TERRY at glaver.org> wrote:
> >   I have a system I updated from r352025 (which worked fine) to r352200.
> > Any attempt to boot r352200 results in the system just sitting there after
> > displaying the normal "Trying to mount root from ufs:/dev/da0p3 [rw]..."
> > message. Nothing further, not even after a half hour. The console is non-
> > responsive (not that I'd really expect anything, but...).
> >
> >   This persists across multiple resets, power cycles, etc. Booting the
> > previous r352025 works fine, as expected.
> >
> >   Before I start trying to bisect this, is anyone else seeing this? amd64
> > on a standard Dell PowerEdge R730 if that matters.