Re: [patch 1/4] Ignore stolen time in the softlockup watchdog
From: Andrew Morton
Date: Tue Apr 24 2007 - 16:16:03 EST
On Tue, 24 Apr 2007 13:00:49 -0700 Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Andrew Morton wrote:
> > Well, it _is_ mysterious.
> > Did you try to locate the code which failed? I got lost in macros and
> > include files, and gave up very very easily. Stop hiding, Ingo.
> OK, I've managed to reproduce it. Removing the local_irq_save/restore
> from sched_clock() makes it go away, as I'd expect (otherwise it would
> really be magic).
erm, why do you expect that? A local_irq_save()/local_irq_restore() pair
shouldn't be affecting anything?
> But given that it never seems to touch the softlockup
> during testing, I have no idea what difference it makes...
To what softlockup are you referring, and what does that have to do with
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