fatal double fault (spinlock)
kris at FreeBSD.org
Tue Sep 4 17:43:07 PDT 2007
Duane Hill wrote:
> We have a Dell PowerEdge 6850 with four 3ghz Intel dual core Xeon
> processors and 12 gig ram. It is running FreeBSD 5.5-RELEASE-p15 amd64.
> SMP has been compiled into the kernel. However,
> machdep.hyperthreading_allowed has been set to zero(0) in
> Once about every 1.5 to 2 weeks, the server throws the error:
> fatal double fault
> spinlock sched lock held by 0xffffff032f3c1500 > 5 seconds
> This server is located in a colo many miles away. I had to have a person
> at the colo facility read off the message that was on the screen. I hope
> it is exact (or at least close).
> This server is one of our main spam filter servers. It use to have an
> MTA installed on it that required FreeBSD 5.5. That software does not
> run on the server anymore.
> I've been meaning to upgrade the server to 6.2 release, but have been
> procrastinating. Would upgrading the server to 6.2 release correct this
Chances are good: by running 5.5 you are missing out on several years of
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