Enabling MCA causes system hangs

Daniel O'Connor doconnor at gsoft.com.au
Tue Sep 14 07:19:57 UTC 2010

On 10/09/2010, at 22:00, Andriy Gapon wrote:
>>> uname is.. FreeBSD midget.dons.net.au 8.0-STABLE FreeBSD 8.0-STABLE #6
>>> r202903M: Sun Jan 24 13:45:11 CST 2010
>>> darius at midget.dons.net.au:/usr/obj/usr/src/sys/MIDGET  amd64
> Oh, I should have payed attention to the version.
> I think that this is a known and resolved problem.
> There is a hardware bug in AMD 10h processors that is triggered by combination
> of enabled MCA and FreeBSD superpages.
> So, you either have to disable one of them or upgrade to a more recent version.
> The version you need is r206183.  The latest stable/8 would do, obviously.

I'll try updating to stable/8 - I've been meaning to anyway.

Just to find the spare time to do it :)

Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
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