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Date:      Fri, 18 Jan 2019 17:34:54 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 235031] [em] em0: poor NFS performance, strange behavior
Message-ID:  <bug-235031-7501-Bc0oP8lmmb@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-235031-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-235031-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235031

--- Comment #10 from Eugene Grosbein <eugen@freebsd.org> ---
(In reply to Martin Birgmeier from comment #9)

>I added hw.pci.enable_msi=3D0 to /boot/loader.conf, which was a bad idea, =
because with this, after loading the kernel, the system does not find ada0 =
anymore.

That's why I suggested to use loader prompt. Next time, if you need to test
something like this and cannot use loader prompt directly, use nextboot(8)
feature that guarantees safe fallback to known working configuration even if
boot is broken during experiment: you add "hw.pci.enable_msi=3D0" (or anoth=
er
setting) to /boot/nextboot.conf that is created with nextboot(8) command and
loader uses nextboot.conf for one time only ignoring it for successive load=
ing
attempts and nextboot.conf is removed completely during first successfull b=
oot.

You can even change root file system name, kernel name or set of loaded ker=
nel
modules using nextboot safely.

--=20
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