[Bug 206567] [msk] msk0: watchdog timeout - 88E8053 on i386

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206567

--- Comment #12 from Chris Hutchinson <portmaster at bsdforge.com> ---
(In reply to Tom Lane from comment #11)
OK. I only see one MSI-X message in dmesg(8)
It's related to your (msk) card -- Found 1 of
1 interrupts. I ran into the same error you're
reporting. But it was on a dual port re (realtek)
card. The most proposed solution was to disable
MSI-X on the card. Blamed on a poor implementation.
I wasn't satisfied with that, as doing so would
reduce performance, and I work that card pretty
hard. So I performed some additional investigation
into exactly *why* this problem occurs, and ultimately
decided to investigate the kernel tunable
kern.ipc.nmbjumbop
and
kern.ipc.nmbclusters
After tweaking them for awhile. I found thresholds
that eliminated the error, and have been running
the card blissfully for about 9 months now. If I
were you, I might be inclined to increase those
numbers until the errors cease. There is no magic
number I can provide. As it differs from card to
card, and load to load. But it's enough to say that
the *default* number is inadequate (too small).

HTH

--Chris

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