Messages in this thread | | | Date | Tue, 15 Nov 2005 12:07:18 -0800 (PST) | From | Daniel Walker <> | Subject | Re: [BUG] Softlockup detected with linux-2.6.14-rt6 |
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Wasn't this thread related to a real lock up? I thought Luca said that the stack trace came from his printer.
I thought it might be related to the __delay troubles ..
Daniel
On Tue, 15 Nov 2005, Ingo Molnar wrote:
> > * john cooper <john.cooper@timesys.com> wrote: > >> Ingo Molnar wrote: >>> * Luca Falavigna <dktrkranz@gmail.com> wrote: >>>> I found this softlockup bug involving arts daemon using a >>>> linux-2.6.14-rt6 kernel (with "Complete Preemption" and "Detect Soft >>>> Lockups" compiled in). >>>> This bug does not happen everytime: I was able to reproduce it only >>>> three times in a week. [...] >>> >>> >>> does this happen with -rt13 too? I have fixed a softlockup >>> false-positive in it. >> >> Just curious what the cause of the false positive was? > > the fix is below - we didnt reset the 'light' counter in the else > branch. > > Ingo > > Index: linux/kernel/softlockup.c > =================================================================== > --- linux.orig/kernel/softlockup.c > +++ linux/kernel/softlockup.c > @@ -90,7 +90,8 @@ void softlockup_tick(void) > > wake_up_process(per_cpu(watchdog_task, this_cpu)); > per_cpu(timeout, this_cpu) = jiffies + msecs_to_jiffies(1000); > - } > + } else > + touch_light_softlockup_watchdog(); > > if (per_cpu(print_timestamp, this_cpu) == timestamp) > return; > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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