Re: jiffies wraparound

From: Adam (adam@eax.com)
Date: Thu Mar 16 2000 - 23:29:17 EST


> > on Intel machines the jiffies count will wrap sometime after a year of
> > uptime (4 billion / 100 seconds). It also mentioned that weird stuff may
> > happen at this time (as you may expect, if anyone is making poor
> > assumptions about jiffies). Has anyone ever edited the kernel so that
> > jiffies starts at 0xFFF00000 at boot to see what happens, and fix any
> > ensuing problems?
>
> I've got one machine that's been up and running since Sep 24, 1996.
> That's two wraps already; haven't seen any strange things happening.

Which kernel would be that?
That's over 1000 days?

I think I already lost console on my box, but since I hadn't been using it
in favor of ssh and serial console it is not a big deal.

I'm also getting messages like this one below. I brought it down to single
user mode, remounted hdd ro and fscked few months back. However, it but it
did not make them to go away.

        Mar 12 22:49:54 eax kernel: VFS: Close: file count is 0

Past this the box is okay

box adam % uname -a
Linux box 2.0.36 #5 Sat Oct 31 02:15:10 EST 1998 i586 unknown
box adam % uptime
 11:24pm up 488 days, 10:15, 16 users, load average: 0.08, 0.03, 0.01

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