linux-kernel - Re: /proc/kcore has a unreasonable size(281474974617600) in x86

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Date:	Fri, 05 Jun 2009 22:26:21 +0800
From:	Tao Ma <tao.ma@...cle.com>
To:	Amerigo Wang <xiyou.wangcong@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Yinghai Lu <yinghai@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64
 2.6.30-rc8.



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

the printk is attached.

Thanks.
Tao

View attachment "printk.diff" of type "text/plain" (638 bytes)