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

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Message-ID: <20130423042234.GH2672@localhost.localdomain>
Date:	Tue, 23 Apr 2013 12:22:34 +0800
From:	Han Pingtian <hanpt@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mhocko@...e.cz, rientjes@...gle.com
Subject: Re: OOM-killer and strange RSS value in 3.9-rc7

On Mon, Apr 22, 2013 at 01:40:52PM +0200, Michal Hocko wrote:
> >  CONFIG_PPC_BOOK3S_64=y
> >  # CONFIG_PPC_BOOK3E_64 is not set
> > -CONFIG_GENERIC_CPU=y
> > +# CONFIG_GENERIC_CPU is not set
> >  # CONFIG_CELL_CPU is not set
> >  # CONFIG_POWER4_CPU is not set
> >  # CONFIG_POWER5_CPU is not set
> >  # CONFIG_POWER6_CPU is not set
> > -# CONFIG_POWER7_CPU is not set
> > +CONFIG_POWER7_CPU=y
> 
> Wow, so the two configs are for different architectures? Not very much
> helpful. Could you stick with a single machine and do just small updates
> to the config to the point where the problem is no longer present,
> please?
> 
No, both configs are for power system. I changed it to
'CONFIG_POWER7_CPU' by myself in the good one. I think this difference
doesn't matter here. 
> [...]
> > -CONFIG_SLUB_DEBUG=y
> > -# CONFIG_COMPAT_BRK is not set
> > -# CONFIG_SLAB is not set
> > -CONFIG_SLUB=y
> > +CONFIG_COMPAT_BRK=y
> > +CONFIG_SLAB=y
> 
> I would start with the bad config and SLUB changed to SLAB in the first
> step, though.
> 
Yep, after I changed bad config to use SLAB, the problem disppears after
using the new kernel. Looks like something wrong in SLUB?

Thanks.
> [...]
> -- 
> Michal Hocko
> SUSE Labs

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