[Bug 234766] em(4) Intel 82579LM MSI-X regression on Supermicro X9SCM-F

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234766

Eric Joyner <erj at freebsd.org> changed:

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                 CC|                            |erj at freebsd.org

--- Comment #3 from Eric Joyner <erj at 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 the
only difference would be that that iflib tries and fails to map the MSI-X bar.

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 shouldn't
even be attempted on the 82579.

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

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