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Date:      Sat, 25 Jan 2020 08:36:11 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 230807] if_alc(4): Driver not working for Killer Networking E2200
Message-ID:  <bug-230807-7501-RM4LmfNIpp@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-230807-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-230807-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230807

--- Comment #8 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Kubilay Kocak from comment #7)

It is working without the patch when the threadripper 1950X ACPI is
configured as non-NUMA (via what the old Ryzen Master version calls
"distributed" mode).

I am no longer actively experimenting with NUMA mode for other
purposes, at least for now. So if I just applied the patch and
rebuilt and reinstalled, I'd just be testing if it stopped the
working context from working. That presumes that I understood
what the patch is to be, but I do not.

The way I read the forum message, the shown lines of code were
already in /usr/src/sys/dev/alc/if_alc.c and a somewhat different
pair of lines was to be put somewhere ("with modified if condition").
I've no clue what the modification was nor where the two new lines
were to be put. (Knowing the later might help identify the former
by giving a context to examine.)

Is the patch expected to be NUMA-specific as far as fixing things?
Are you asking that I try the patch when the ACPI information is
configured for NUMA (called "local" mode in that Ryzen Master)?

If yes-and-yes, then I'd first need to somehow identify the
specific patch to be made, unless someone that knows reports
the specifics that I should use. I have yet to figure this
out on my own.

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