Re: /proc/kcore has a unreasonable size(281474974617600) in x86_642.6.30-rc8.

[Tao Ma]

Andrew Morton wrote:
> On Fri, 05 Jun 2009 12:03:52 +0800 Tao Ma <tao.ma@xxxxxxxxxx> wrote:
>
> > Hi list,
> >        In 2.6.30-rc8, /proc/kcore in x86_64's size is unreasonable large 
> > to be 281474974617600.
> > While in a x86 box, it is 931131392 which looks sane.
> >
> > [root@test8 ~]# ll /proc/kcore
> > -r-------- 1 root root 281474974617600 Jun  5 11:15 /proc/kcore
> >
> > [root@ocfs2-test9 ~]$ ll /proc/kcore
> > -r-------- 1 root root 931131392 Jun  5 11:58 /proc/kcore
> >
> > I just noticed this when kexec fails in "Can't find kernel text map area 
> > from kcore".
> >
> > Is there something wrong?
>
> fs/proc/kcore.c hasn't changed since October last year.  Was 2.6.29 OK?
> Earlier kernels?
with 2.6.29, ls shows the same output.
[root@test8 ~]# ll /proc/kcore
-r-------- 1 root root 281474974617600 Jun  5 14:35 /proc/kcore

But the kexec works.

I just checked .28, the same as .29.

Regards,
Tao
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