Re: OOM-killer and strange RSS value in 3.9-rc7

Han Pingtian
2013-04-22T03:15:13Z

On Sun, Apr 21, 2013 at 02:49:31AM +0200, Jiri Kosina wrote:
> On Wed, 17 Apr 2013, Han Pingtian wrote:
>
> > > > On a power7 system, we have installed 3.9-rc7 and crash 6.1.6. If I run
> > > > something like "make -j 64" to compile linux kernel from source, sooner
> > > > or latter, oom-killer will be triggered. Before that, when I trying to
> > > > analyse the live system with crash, some processes' %MEM and RSS looks
> > > > too big:
> > > >
> > >
> > > Do you have the oom killer log from /var/log/messages with
> > > /proc/sys/vm/oom_dump_tasks enabled? Have you tried to reproduce this
> > > issue with CONFIG_DEBUG_VM and CONFIG_DEBUG_PAGEALLOC enabled (you may
> > > even want to consider CONFIG_KMEMLEAK)?
> >
> > I have enabled CONFIG_KMEMLEAK and recompiled kernel. This is the
> > /sys/kernel/debug/kmemleak after the reboot. Please have a look. Thanks.
>
> Either kmemleak is very wrong about some false positive in selinux, or
> selinux is leaking memory quite heavily.
>
> Could you try disabling selinux completely, to see if the leak goes away?
>
Thanks your reply. We had disable selinux from the very beginning.