* Frank Sorenson <[email protected]> [050407 15:21]:
> Frank Sorenson wrote:
> > Tony Lindgren wrote:
> >
> >>Thanks for trying it out. What kind of hardware do you have? Does it
> >>have HPET? It looks like no suitable timer for dyn-tick is found...
> >>Maybe the following patch helps?
> >>
> >>Tony
> >
> >
> > Does 'different crash' qualify as "helping"? :)
>
> Update:
> The patch does seem to fix the crash. This "different crash" I
> mentioned appears to be related to the netconsole I was using (serial
> console produces stairstepping text, netconsole seems to duplicate
> lines--go figure). Without netconsole, dynamic tick appears to be
> working, so I'm not sure whether this is a netconsole bug or a dynamic
> tick bug.
This might be because time does not run correctly, see below.
> While dynamic tick no longer panics, with dynamic tick, my system slows
> to whatever is slower than a crawl. It now takes 6 minutes 50 seconds
> to boot all the way up, compared to 1 minute 35 seconds with my 2.6.12
> kernel without the dynamic tick patch. I'm not sure where this slowdown
> is occurring yet.
I think I have an idea on what's going on; Your system does not wake to
APIC interrupt, and the system timer updates time only on other interrupts.
I'm experiencing the same on a loaner ThinkPad T30.
I'll try to do another patch today. Meanwhile it now should work
without lapic in cmdline.
Tony
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