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 /etc/sysctrl.conf.

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 issue?

Chances are good: by running 5.5 you are missing out on several years of bug fixes.

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