linux-kernel - Re: [rfc][patch 1/3] slub: fix small HWCACHE

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Message-ID: <20080307052317.GK21185@wotan.suse.de>
Date:	Fri, 7 Mar 2008 06:23:18 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	Pekka Enberg <penberg@...helsinki.fi>, netdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	yanmin_zhang@...ux.intel.com, David Miller <davem@...emloft.net>,
	Eric Dumazet <dada1@...mosbay.com>
Subject: Re: [rfc][patch 1/3] slub: fix small HWCACHE_ALIGN alignment

On Thu, Mar 06, 2008 at 06:33:35PM -0800, Christoph Lameter wrote:
> On Fri, 7 Mar 2008, Nick Piggin wrote:
> 
> > On Thu, Mar 06, 2008 at 06:27:12PM -0800, Christoph Lameter wrote:
> > > On Fri, 7 Mar 2008, Nick Piggin wrote:
> > > 
> > > > > Is that really a noteworthy effect?
> > > > 
> > > > Yes.
> > > 
> > > Numbers?
> > 
> > Uhh... big number > small number
> 
> Can you quantify the effect?

It obviously won't be a great deal until if/when it starts getting
used more. The space savings on UP are just one reason why my approach
is better than using the static alignment annotations.

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