Re: [patch] fix the softlockup watchdog to actually work

From: Ingo Molnar
Date: Wed Jul 25 2007 - 04:52:25 EST



* Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> > apparently the functionality of the soft lockup watchdog was never
> > actually tested with that patch applied ...
> >
> > [this is -stable material too.]
>
> Still isn't working. I'm getting random meaningless softlockup
> trippings coming out for no apparent reason.

hm, you still havent applied the other 4 patches i sent:

softlockup-fix.patch

softlockup-add-irq-regs-h.patch
softlockup-better-printout.patch
softlockup-cleanups.patch
softlockup-use-cpu-clock.patch

they are all necessary.

softlockup-use-cpu-clock.patch could easily solve the present problem
you have: as i pointed it out it is _wrong_ to use sched_clock(),
because sched_clock() is not a reliable clocksource. Especially on your
VAIO.

Ingo
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