wrong uptime in 2.5.72

I'm getting a bad uptime with 2.5.72... It comes up with 497 as soon as you boot (I've rebooted multiple times). The problem wasn't there in 2.5.70. This machine is a Sun Ultra 5.

I found this mail in the archives that might help some...
http://www.ussg.iu.edu/hypermail/linux/kernel/0306.1/1698.html

sun root # uname -a
Linux sun.nowhere.net 2.5.72 #1 Tue Jun 17 10:25:45 EST 2003 sparc64 sun4u TI UltraSparc IIi GNU/Linux sun root # uptime
10:46:35 up 497 days, 2:24, 1 user, load average: 0.28, 0.17, 0.07
sun root # cat /proc/uptime
42949481.55 77.26
sun root # cat /proc/stat
cpu 1382 0 1783 7626 466
cpu0 1382 0 1783 7626 466
intr 12650 11256 0 0 0 928 459 0 0 0 0 0 0 7 0 0 0
ctxt 14048
btime 1055864690
processes 4217
procs_running 2
procs_blocked 0
sun root # cat /proc/cpuinfo
cpu : TI UltraSparc IIi
fpu : UltraSparc IIi integrated FPU
promlib : Version 3 Revision 25
prom : 3.25.1
type : sun4u
ncpus probed : 1
ncpus active : 1
Cpu0Bogo : 719.25
Cpu0ClkTck : 0000000015752a00
MMU Type : Spitfire

The system now uses the posix clock_monotonic clock to compute uptime.
This clock requires that the arch code (do_settime) keep track of
time settings and back them out of "wall_to_monotonic".

There was also a recent change to set wall_to_monotonic to -(xtime) so that this clock would be 0 at boot time. This is usually done in the arch/kernel/time.c code where xtime (i.e. the system time) is set during boot up. Prior code set it to the initial jiffies value. I suspect that this change did not get into your kernel.

-g

George Anzinger   [email protected]
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml