4.11 panic every 23 hours 55 minutes or so

Glen Barber glen.j.barber at gmail.com
Sun May 17 11:39:48 UTC 2009

On Sun, May 17, 2009 at 7:06 AM, Doug Lee <dgl at dlee.org> wrote:
> One of the weirder things I've seen in a while here...
> OS: FreeBSD 4.11 (yeah I know, old, but generally stable)
> CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz
> real memory  = 536608768 (524032K bytes)
> Hds: IDE

Do you by chance have the kernel built with debugging enabled?

> Problem:  Ever since a suspitious power outage (I say suspitious
> because we think a surge was also involved), this box has been
> exhibiting kernel panics about every 23 hours 55 minutes, give or
> take about 4 minutes either way.  Obviously hardware is suspect,
> and hopefully in line for upgrade; but as FreeBSD has always proven
> so stable for me, I'm curious what on earth could cause this sort
> of regular panic?
> It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other
> time, it's 23:55 or so later I get a panic, whenever that may be.
> I think this rules out cron jobs, external attacks, and load-based
> issues.

Perhaps a bad CMOS battery causing the system time to become
corrupted?  (I know it's a long shot...)

Glen Barber

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