Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64 2.6.30-rc8.

Tao Ma
2009-06-06T14:39:20Z

Yinghai Lu wrote:
> Tao Ma wrote:
>>
>> Amerigo Wang wrote:
>>> On Fri, Jun 05, 2009 at 05:30:49PM +0800, Tao Ma wrote:
>>>>> Please send the boot logs: dmesg -s 1000000 > foo
>>>> attached.
>>>> #######high memory 18446612137615818752, size_t 18446612137615818752
>>>> #######kcore size 5301604352, PAGE_OFFSET 0, PAGE_SIZE 4096
>>>
>>> These two lines must be added by yourself...
>>>
>>> What?!
>>> How can PAGE_OFFSET be 0??
>>> Can you show us these two printk() you just added?
>>>
>>> And, the size of kcore is not the crazy number in the subject...
>>> This one is much saner..
>> Sorry, I used the wrong printk. the correct one is:
>> #######high memory 18446612137615818752, size_t 18446612137615818752
>> #######kcore size 5301604352, PAGE_OFFSET 18446612132314218496,
>> PAGE_SIZE 4096
>>
>
> %lx should be used.
>
> also you compiler doesn't like
>
> high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
>
> in setup.c?
Sorry fo my poor English, bug what do you mean?

I just printk in the setup.c and the result is

@@@@high_momory ffff88013c000000

and my gcc version is:
gcc (GCC) 4.1.2 20070626 (Red Hat 4.1.2-14)

Thanks.
Tao