linux-kernel - Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

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Message-ID: <Pine.LNX.4.64.0805281328310.982@schroedinger.engr.sgi.com>
Date:	Wed, 28 May 2008 13:29:05 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Paul Mundt <lethal@...ux-sh.org>,
	LKML <linux-kernel@...r.kernel.org>, cooloney@...nel.org,
	akpm@...ux-foundation.org, dhowells@...hat.com, mpm@...enic.com
Subject: Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

On Wed, 28 May 2008, Pekka Enberg wrote:

> Christoph Lameter wrote:
> > > We use kobjsize() for pointers returned from do_mmap() which is why I kept
> > > the
> > > page->index case. Are we using PageCompound for those as well?
> > 
> > What does do_mmap have to do with page->index?
> 
> I don't know how the nommu code is supposed to work. I simply assumed it has a
> reason for being there and that compound_order() is not enough to handle that.

Could the nommu people either tell us what this is all about? Or junk the 
code. This looks very wrong.

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