Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24

Chuck Harding
2005-06-28T22:19:26Z

On Tue, 28 Jun 2005, Ingo Molnar wrote:

>
> * Ingo Molnar <mingo@elte.hu> wrote:
>
>> * Steven Rostedt <rostedt@goodmis.org> wrote:
>>
>>> Although turning off apm works, this is a fix to the symptom and not a
>>> cure. Has someone already taken a look at this code? Since
>>> apm_bios_call_simple calls local_save_flags and afterwards
>>> raw_lock_irq_restore is then called. Shouldn't that have been
>>> raw_local_save_flags?
>>
>> ah, indeed. I fixed this bug and have uploaded the -50-26 patch.
>> Chuck, does this fix the APM problems for you?
>
> i've also uploaded -50-27 in which i've improved the irq-flags debugging
> code. They are activated if CONFIG_DEBUG_PREEMPT is enabled, and can
> come in two variants of kernel messages:
>
> BUG: bad raw irq-flag value 80000000, test/3810!
> BUG: bad soft irq-flag value 00000202, test/3810!
>
> so we should now be able to detect mismatches of irq flags right where
> they occur.
>
> Ingo

Ack!! I didn't have that enabled so I am rebuilding again. One thing I've
noticed is that sox seems to be hanging when it is trying to play a .wav
file (for system beeps) and there aren't any error messages about what
might be going on.

--
Charles D. (Chuck) Harding <charding@llnl.gov> Voice: 925-423-8879
Senior Computer Associate ICCD Fax: 925-423-6961
Lawrence Livermore National Laboratory Computation Directorate
Livermore, CA USA http://www.llnl.gov GPG Public Key ID: B9EB6601
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