linux-kernel - Re: [PATCH v2 1/2] kmem_cache: include allocators code directly into slab

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Message-ID: <20121030202750.GW16230@one.firstfloor.org>
Date:	Tue, 30 Oct 2012 21:27:50 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	andi@...stfloor.org, Pekka Enberg <penberg@...nel.org>,
	Glauber Costa <glommer@...allels.com>, linux-mm@...ck.org,
	JoonSoo Kim <js1304@...il.com>, linux-kernel@...r.kernel.org,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH v2 1/2] kmem_cache: include allocators code directly into slab_common

On Tue, Oct 30, 2012 at 03:31:51PM +0000, Christoph Lameter wrote:
> On Fri, 26 Oct 2012, JoonSoo Kim wrote:
> 
> > 2012/10/25 Christoph Lameter <cl@...ux.com>:
> > > On Wed, 24 Oct 2012, Pekka Enberg wrote:
> > >
> > >> So I hate this patch with a passion. We don't have any fastpaths in
> > >> mm/slab_common.c nor should we. Those should be allocator specific.
> > >
> > > I have similar thoughts on the issue. Lets keep the fast paths allocator
> > > specific until we find a better way to handle this issue.
> >
> > Okay. I see.
> > How about applying LTO not to the whole kernel code, but just to
> > slab_common.o + sl[aou]b.o?
> > I think that it may be possible, isn't it?
> 
> Well.... Andi: Is that possible?

In principle yes, but would still need a toolchain with LTO 
support and a few changes.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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