FWIW, I have tentatively fingered ntpd as the culprit. At least, since
turning off ntpd I have not seen a recurrence of this problem.
Doc Evans
-----
On 4 Jul 01, at 18:40, D. R. Evans wrote:
> Running LM 7.2 on a stock 700 MHz Athlon.
>
> Everything was working fine until sometime in the past day or two
> something got changed such that I now see the following behaviour:
>
> Sometimes when the clock ticks across an hour boundary, the disk light
> comes on and stays on. The machine is so busy that the only thing I can
> do is to power it down.
>
> This happened yesterday at 2300Z and today at 2400Z.
>
> Is there anything I can do that will let me log what process might be
> causing this, so that after the enforced manual reboot I can figure out
> which process is the culprit?
>
> I have made a lot of changes to user programs in the past day or so,
> although I would like to think that Linux would ensure that if the
> problem was a regular user program, I would still be able to get enough
> time to log in and run a ps to look to see what's happening.
>
> I also added ntpd (the 4.0 latest release from ntp.org), which seems
> very suspicious to me -- but it's pretty hard to believe that anything
> problem this major could be lurking in such well-tested code;
> especially since I'm not doing anything fancy in the config file.
>
> Doc Evans
>
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