Messages in this thread | | | From | Gene Heskett <> | Subject | Re: uptime reset after about 45 days | Date | Fri, 31 Oct 2003 08:20:04 -0500 |
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On Friday 31 October 2003 05:37, Jakob Oestergaard wrote: >On Fri, Oct 31, 2003 at 12:09:25AM +0100, Maciej Zenczykowski wrote: >... > >> Uptime is stored in jiffies which is 32bit on your arch, which >> results in an overflow after 2^32 clock ticks. TTTicks were 100 HZ >> till recently (overflow after 470 or so days) now, they're 1000 -> >> overflows after 45 days. Doesn't wreck anything except for uptime >> display - known problem, not worth the trouble fixing it would >> cause (64 bit values are non-atomic, unless MMX/SSE which isn't >> allowed in kernel) - however there is (if I'm not mistaken) a >> patch available wihich fixes this 'problem'. >> >> However since it is only a matter of uptime display... > >For me it would mean that I got disturbed or woken up by an SMS > every 45 / (number_of_servers) = (low_number) days, because the > monitoring system sees that a server suddenly has a 'suspiciously > low' uptime. > >Fix the monitoring system to detect uptime wraps? > >Perhaps. It would be needed for Windows 95 as well, anyway.
Win95 needs more than an uptime patch at that point because the keyboard is dead and only a reboot fixes it. We've been rebooting a Win95 wire capture machine every 45-46 days on a schedule because of that.
>Still, it's pretty darn pathetic to be required to include > workarounds in *Linux* apps that would otherwise only be needed for > '95. > >All in my humble oppinion of course.
-- Cheers, Gene AMD K6-III@500mhz 320M Athlon1600XP@1400mhz 512M 99.27% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attornies please note, additions to this message by Gene Heskett are: Copyright 2003 by Maurice Eugene Heskett, all rights reserved.
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