Hi,

Ever since I went to the new 2.6.25-rcX, I encountered lots of random
system freezes after about 2 or 3 hours of uptime... but until now, 
I couldn't _catch_ them, since the system
(AMD Athlon 4200+ X2 (Manchester) / nforce 4 SLI / x86_64) went
straight into oblivion (nothing on the serial console or anywhere else,
heck I couldn't even hit reset, It didn't POST anymore)

So. take a look at stuck_task... that's best backtrace I could get...
(I have other logs too. (Task-list / Lockdep / ... ) but it's too much
and I hope the _logs_ are already enough.

BTW: I noticed that the clock seems to jump forward and backwards.
Is this because the CPU-Cores aren't syncronized? (And why are they
out of sync?)

(And yes, 2.6.24.4 is fine... even hpet works there without any
rtc: lost 14 interrupts)

cat /proc/interrupts
           CPU0       CPU1
  0:         51          0    XT-PIC-XT        timer
  1:         43      22170   IO-APIC-edge      i8042
  4:          0          1   IO-APIC-edge
  6:          0          5   IO-APIC-edge      floppy
  7:          1          0   IO-APIC-edge      parport0
  8:          0        199   IO-APIC-edge      rtc
  9:          0          0   IO-APIC-fasteoi   acpi
 14:          0          0   IO-APIC-edge      pata_amd
 15:          0          0   IO-APIC-edge      pata_amd
 16:         82      51311   IO-APIC-fasteoi   firewire_ohci, EMU10K1
 17:          0         50   IO-APIC-fasteoi   firewire_ohci, eth1
 18:         12       4862   IO-APIC-fasteoi   nvidia
 20:        421     304857   IO-APIC-fasteoi   eth0
 21:         57      33025   IO-APIC-fasteoi   ohci_hcd:usb1
 22:        185      12275   IO-APIC-fasteoi   sata_nv
 23:        276      83270   IO-APIC-fasteoi   sata_nv, ehci_hcd:usb2
NMI:          0          0   Non-maskable interrupts
LOC:     339847     307599   Local timer interrupts
RES:     126709      38837   Rescheduling interrupts
CAL:        605       1054   function call interrupts
TLB:       1513       3813   TLB shootdowns
TRM:          0          0   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
SPU:          0          0   Spurious interrupts
ERR:          1