Re: SMP time warps: count > LATCH - 1

From: Ard van Breemen (ard@kwaak.net)
Date: Wed May 31 2000 - 03:42:14 EST


On Tue, May 30, 2000 at 09:45:57PM -0700, dave madden wrote:
> Hi. I have a long-standing problem with timekeeping on my 2xPIII
> machine: sooner or later after a reboot, successive calls to
> gettimeofday will return large negative deltas (i.e. time goes
> backwards). Several kernel gurus have offered help and patches, but
> to no avail; I usually end up just brute-forcing the kernel to never
> return a time earlier than one previously returned.
Well, actually I've seen this rather weird behaviour on 2.2.14 UP.
The delta I've seen is exactly 0xffffffff00000000, occurring after
some minutes, or after a few days.

Using gcc-2.7.2 instead of gcc-2.95.2 seems to fix the problems.
(I've seen other systems exhibiting this behaviour, all compiled with
gcc-2.95.2)

I hope it is the same problem

--
 intel1: 10:29am up 21 days, 11:41, 2 users, load average: 1.00, 1.00, 0.98

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