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SubjectRe: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00
K.R. Foley wrote:
> Ingo Molnar wrote:
>
>> * K.R. Foley <kr@cybsft.com> wrote:
>>
>>
>>>> could you uncomment the IO_APIC_CACHE define in
>>>> arch/i386/kernel/io_apic.c, and could you uncomment line 1109 in
>>>> drivers/ide/ide-io.c - does this fix things? (in apic mode)
>>
>>
>>
>>> Couple of things: 1) I could not find IO_APIC_CACHE anywhere. I could
>>> find IOAPIC_CACHE but the define was not commented in io_apic.c. Also
>>> the BUG_ON at line 1109 in ide-io.c was not commented out either. So
>>> I made the mental leap that you actually meant to comment these out
>>> instead of uncomment them??? [...]
>>
>>
>>
>> yeah, sorry :-|
>>
>
> OK so there really was no mental leap. It was more like a
> trip,stumble,roll,grasp :-) I actually discovered the real meaning of
> the above after commenting out only one of the above and failed boot.
> Only then did it dawn on me what you were trying for. Hence the last
> line of my email not being finished.
>
>>
>>> [...] That works to get the system booted. Although I am getting many
>>> soft lockups now, minutes after the boot. Log attached. [...]
>>
>>
>>
>> hm, do you get actual lockups, or only the messages about them? I.e.
>> does the system work fine if you [the sounds of careful thinking to
>> get the word right] disable CONFIG_DETECT_SOFTLOCKUP, or does it lock
>> up silently?
>

Just had an opportunity to check this. Everything does indeed seem to be
working OK with this disabled. No lock up messages, no perceived problems.

>
> There doesn't seem to be any actual lockups, just messages. I will try
> disabling the above when I get home this evening. Can't get to the
> system right now.
>
>>
>>
>>> [...] 2) In my infinite wisdom before :-) I failed to attach my
>>> config as I should have done before. Also, commenting out
>>
>>
>>
>> this looks like a sentence worth finishing? :)
>
> Actually see my comment above about the "trip,stumble,roll,grasp" The
> line above is the point at which I realized what was going on. :-D
>
>>
>> Ingo
>>
>
>


--
kr
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