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

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Message-ID: <20121024153359.GK16230@one.firstfloor.org>
Date:	Wed, 24 Oct 2012 17:33:59 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	andi@...stfloor.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Glauber Costa <glommer@...allels.com>
Subject: Re: [PATCH v2 1/2] kmem_cache: include allocators code directly into slab_common

On Wed, Oct 24, 2012 at 02:29:09PM +0000, Christoph Lameter wrote:
> On Wed, 24 Oct 2012, Glauber Costa wrote:
> 
> > Because of that, we either have to move all the entry points to the
> > mm/slab.h and rely heavily on the pre-processor, or include all .c files
> > in here.
> 
> Hmm... That is a bit of a radical solution. The global optimizations now
> possible with the new gcc compiler include the ability to fold functions
> across different linkable objects. Andi, is that usable for kernel builds?

Yes, but you need a fairly large patchkit which is not mainline yet.

https://github.com/andikleen/linux-misc/tree/lto

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