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Date: Tue, 9 Jun 2009 08:43:34 +0800
Message-ID: <2375c9f90906081743p77934f47n8ba1a018d333b95b@mail.gmail.com>
Subject: Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64 
	2.6.30-rc8.
From: =?UTF-8?Q?Am=C3=A9rico_Wang?= <xiyou.wangcong@gmail.com>
To: Tao Ma <tao.ma@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Alexey Dobriyan <adobriyan@gmail.com>
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On Mon, Jun 8, 2009 at 4:00 PM, Tao Ma<tao.ma@oracle.com> wrote:
>>>
>>> But the result is the same
>>
>> Yes?
>> Your printk() shows kcore size is: 5301604352, and in your subject it is
>> 281474974617600...
>>
>> Or they happened in the same time?
>
> yes. the same box and the same linux version.
> A bit strange.
>
> [taoma@ocfs2-test2 ~]$ dmesg|grep "high memory"
> high memory ffff88013c000000, size 5301604352
> [taoma@ocfs2-test2 ~]$ ll /proc/kcore
> -r-------- 1 root root 281474974617600 Jun  8 15:20 /proc/kcore

Really weird...
They should be the same. This means we have some problem in our procfs.

And, we have no problem on i386, I, myself, even can't reproduce this on my
x86_64 box...

Drop Cc to x86 people, add some Cc to proc people. :)

Eric, Alexey, any ideas?

Tao, would you like to send us your .config? Thanks.