linux-kernel - Re: linux-next Regression: Unable to locate IOAPIC

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Date:	Sat, 14 Jun 2008 01:26:41 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Alexey Starikovskiy" <aystarik@...il.com>
Cc:	webmaster@...gonslave.de,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
	linux-acpi@...r.kernel.org, "Ingo Molnar" <mingo@...e.hu>
Subject: Re: linux-next Regression: Unable to locate IOAPIC

On Sat, Jun 14, 2008 at 12:07 AM, Alexey Starikovskiy
<aystarik@...il.com> wrote:
> Hi Ingo, Yinghai,
>
> It looks like the code introduced by
> 2944e16b25e7fb8b5ee0dd9dc7197a0f9e523cfd
> is causing this problem. At least it is new between -rc5 (working) and
> linux-next (not working).
>
> Regards,
> Alex.
>
>
> Daniel Exner wrote:
>>
>> Hi all,
>>
>> Alexey Starikovskiy wrote:
>>
>>>
>>> Hi Daniel,
>>>
>>> Could you please provide full dmesg and acpidump outputs?
>>>
>>
>> I attached dmesg and config , both from working 2.6.26-rc5 with git-acpi
>> patch below and from linux-next snapshot 20080604.
>> I also attached acpidump that was done while using stock 2.6.25-fw5 from
>> my distro. (But I think that doesnt matter, at least it shouldn't ;)
>>
>>
>>>
>>> Daniel Exner wrote:
>>>
>>>>
>>>> Andrew Morton wrote:
>>>>
>>>>>
>>>>> On Fri, 6 Jun 2008 19:30:28 +0200 Daniel Exner <dex@...gonslave.de>
>>>>>
>>
>> wrote:
>>
>>>>>>
>>>>>> Andrew Morton wrote:
>>>>>>
>>>>>>>
>>>>>>> (cc linux-acpi)
>>>>>>>
>>>>>>> On Thu, 5 Jun 2008 11:00:12 +0200 Daniel Exner <dex@...gonslave.de>
>>>>>>>
>>>>
>>>> wrote:
>>>>
>>>>>>>>
>>>>>>>> Hi!
>>>>>>>>
>>>>>>>> (Added myself to CC, because I'm not subscribed)
>>>>>>>>
>>>>>>>> with linux-next snapshot 20080604 my Laptop morphes into sitting
>>>>>>>> duck
>>>>>>>> and I think this is due to this:
>>>>>>>>
>>>>>>>
>>>>>>> I assume 2.6.26-rc5 is OK?
>>>>>>>
>>>>>>
>>>>>> Indeed.. just tried it with (nearly) the same config: no unable to
>>>>>> locate IOAPIC
>>>>>>
>>>>>> Will try todays next snapshot above -rc5 now.
>>>>>>
>>>>>
>>>>> OK, thanks.
>>>>>
>>>>> It would be great if you could test 2.6.26-rc5 plus
>>>>> http://userweb.kernel.org/~akpm/git-acpi.patch.  That'll allow us to
>>>>> confirm that the regression is due to changes in the acpi tree.
>>>>>
>>>>
>>>> Sorry for the delay.. real-life you know ;)
>>>>
>>>> I guess you'd expect me to confirm the behavior on rc5 with this patch
>>>> aplied, but .. well this Kernel works!
>>>>
>>
>> To clarify myself:
>> 2.6.25.5:  --> relatively fast no IOAPIC Errors in dmesg
>> 2.6.26-rc5:   --> relatively  no IOAPIC Errors in dmesg
>> 2.6.26-rc5 + git-acpi Patch:   --> relatively  no IOAPIC Errors in dmesg
>> 2.6.26-rc5 +  linux-next snapshot 20080604 --> even slower than before my
>> ide Patch many "unable to locate IOAPIC" Errors
>>
>>
>> So I think the problem lies not in the acpi tree but somewhre else.
>>
>> Is it possible to tell git to explicitly _exclude_ a specific tree while
>> bisecting?

can you check if the attached patch fix the problem?
it will not check entries before MP_intsrc_info...

YH

View attachment "enable_update_mptable.patch" of type "text/x-patch" (2125 bytes)