From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joseph Bueno <joseph.bueno@trader.com>
Subject: Re: utmp rollover at 496 days?
Date: Thu, 09 May 2002 20:15:09 +0200
Sender: linux-admin-owner@vger.kernel.org
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To: jim roy <jim@nga.com>
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jim roy wrote :
> 
> I have two machines which have not been rebooted sind Dec 2000.
> 
> At day 497, on both machines, the uptime command began anew at day 0.
> 
> Anybody know what's up with that?
> 
> Jim Roy

Hi,

This is a known problem with older kernels.
uptime is kept in a 32 bits counter with a resolution of 1/100th of
a second so it rollover after 497 days.

It has been discussed in linux-kernel mailing list a few months ago
and I think it is now fixed in 2.4 kernel.

Regards
--
Joseph Bueno
NetClub/Trader.com