Message-ID: <4A360793.6060000@oracle.com>
Date: Mon, 15 Jun 2009 16:34:27 +0800
From: Tao Ma <tao.ma@oracle.com>
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To: Amerigo Wang <xiyou.wangcong@gmail.com>
CC: "Eric W. Biederman" <ebiederm@xmission.com>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [Patch BUGFIX] kcore: fix its wrong size on x86_64
References: <2375c9f90906072341o2cded749m45bdddfdb499469@mail.gmail.com> <4A2CC52B.9010602@oracle.com> <2375c9f90906081743p77934f47n8ba1a018d333b95b@mail.gmail.com> <m1ab4i11zx.fsf@fess.ebiederm.org> <20090611050929.GA2706@cr0.nay.redhat.com> <m11vpqvozl.fsf@fess.ebiederm.org> <20090613040958.GA2959@cr0> <m17hzg7oil.fsf@fess.ebiederm.org> <20090615021457.GA3388@cr0.nay.redhat.com> <4A35E32C.30609@oracle.com> <20090615070018.GD3544@cr0.nay.redhat.com>
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Hi Amerigo,

The wrong number I mean is 131941393240064.

So do you think
[root@test3 ~]# ls -l /proc/kcore
-r-------- 1 root root 131941393240064 Jun 15 13:39 /proc/kcore

is better than

[taoma@test2 ~]$ ll /proc/kcore
-r-------- 1 root root 281474974617600 Jun 15 15:20 /proc/kcore
?

I don't think so.

Actually the right result should look like

[root@test8 ~]# ls -l /proc/kcore
-r-------- 1 root root 5301604352 Jun 15 13:35 /proc/kcore

And with your patch I can't get this number.

Regards,
Tao

Amerigo Wang wrote:
> On Mon, Jun 15, 2009 at 01:59:08PM +0800, Tao Ma wrote:
>> Hi Amerigo,
>> 	Just patched my kernel and tested.
>> 	The bad news is that although the number is changed, but it isn't right  
>> either.
> 
> Thanks for testing.
> 
> What do you mean by saying it isn't right? You think it is wrong only because
> it is more than phy mem size?
> 
> Again, the document of /proc/kcore is wrong, it _can_ be more than phy mem size.
> 
> Regards.
> 
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