Re: [memcg BUG] unable to handle kernel NULL pointer derefence at 00000000

KAMEZAWA Hiroyuki
2008-10-21T09:42:05Z

On Tue, 21 Oct 2008 18:33:18 +0900
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> wrote:

> On Tue, 21 Oct 2008 17:57:35 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > On Tue, 21 Oct 2008 16:35:09 +0800
> > Li Zefan <lizf@cn.fujitsu.com> wrote:
> >
> > > KAMEZAWA Hiroyuki wrote:
> > > > On Tue, 21 Oct 2008 15:21:07 +0800
> > > > Li Zefan <lizf@cn.fujitsu.com> wrote:
> > > >> dmesg is attached.
> > > >>
> > > > Thanks....I think I caught some. (added Mel Gorman to CC:)
> > > >
> > > > NODE_DATA(nid)->spanned_pages just means sum of zone->spanned_pages in node.
> > > >
> > > > So, If there is a hole between zone, node->spanned_pages doesn't mean
> > > > length of node's memmap....(then, some hole can be skipped.)
> > > >
> > > > OMG....Could you try this ?
> > > >
> > >
> > > No luck, the same bug still exists. :(
> > >
> > This is a little fixed one..
> >
> I can reproduce a similar problem(hang on boot) on 2.6.27-git9,
> but this patch doesn't help either on my environment...
>
> I attach a console log(I've not seen NULL pointer dereference yet).
>
>
Thanks....boots well if cgroup_disable=memory ?

Thanks,
-Kame