I upgraded a working system from 5 to 6 and now it dies after 5 or 6 hours. It's still running though because I can SSH into it and I found the following in the kernel.log.
2005:09:21-21:16:21 (none) kernel: Losing too many ticks!
2005:09:21-21:16:21 (none) kernel: TSC cannot be used as a timesource.
2005:09:21-21:16:21 (none) kernel: Possible reasons for this are:
2005:09:21-21:16:21 (none) kernel: You're running with Speedstep,
2005:09:21-21:16:21 (none) kernel: You don't have DMA enabled for your hard disk
(see hdparm),
2005:09:21-21:16:21 (none) kernel: Incorrect TSC synchronization on an SMP syste
m (see dmesg).
2005:09:21-21:16:21 (none) kernel: Falling back to a sane timesource now.
Again, this system worked fine until I loaded version 6.
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