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Date: Mon, 28 Jul 2008 15:34:31 -0300
From: "Glauber Costa" <glommer@gmail.com>
To: "Vegard Nossum" <vegard.nossum@gmail.com>
Subject: Re: -git: BUG: unable to handle kernel paging request at c0100248 [CPU hotplug]
Cc: "Thomas Gleixner" <tglx@linutronix.de>,
       "Dmitry Adamushko" <dmitry.adamushko@gmail.com>,
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On Sun, Jul 27, 2008 at 4:40 PM, Vegard Nossum <vegard.nossum@gmail.com> wrote:
> On Sun, Jul 27, 2008 at 9:35 PM, Vegard Nossum <vegard.nossum@gmail.com> wrote:
>> On Sun, Jul 27, 2008 at 9:23 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
>>> On Sun, 27 Jul 2008, Vegard Nossum wrote:
>>>> Booting processor 1/1 ip 6000
>>>> Initializing CPU#1
>>>> [...]
>>>> Write protecting the kernel text: 5648k
>>>>
>>>> So it succeeds because the protection happens much later :-)
>>>
>>> Patch below fixes the issue. I get it to Linus ASAP.
>>
>> Nice :)

Just saw this one. Thanks for the quick fix! ;-)

>> [...]
>>
>>> +.section .cpuinit.data,"wa"
>>> +.align 4
>>> +ENTRY(initial_code)
>>> +       .long i386_start_kernel
>>> +
>>>  .section .text
>>>  /*
>>>  * Real beginning of normal "text" segment
>>>
>>
>> Hm, isn't there some kind of "section stack" that can be used to
>> restore the previous section? .pushsection/.popsection directives?
>
> Oh, never mind :-)
>
> (Sorry for the noise.)
>
>
> Vegard
>
> --
> "The animistic metaphor of the bug that maliciously sneaked in while
> the programmer was not looking is intellectually dishonest as it
> disguises that the error is the programmer's own creation."
>        -- E. W. Dijkstra, EWD1036
> --
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-- 
Glauber Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."