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Date:      Wed, 09 Jan 2019 21:24:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 234766] em(4) Intel 82579LM MSI-X regression on Supermicro X9SCM-F
Message-ID:  <bug-234766-7501-GvH89bU5Xt@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-234766-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-234766-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234766

Eric Joyner <erj@freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |erj@freebsd.org

--- Comment #3 from Eric Joyner <erj@freebsd.org> ---
(In reply to Henry David Bartholomew from comment #2)

I was going to post a comment about how setting that tunable doesn't really
cause any other change other than to suppress that error message, because t=
he
only difference would be that that iflib tries and fails to map the MSI-X b=
ar.

Regardless, that error message shouldn't be appearing at all on most em(4)
devices since only 82574 supports MSI-X, and so mapping the MSI-X bar shoul=
dn't
even be attempted on the 82579.

I don't know what to do about the queue hangs, though. Have you tried disab=
ling
TSO, if it is enabled?

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