linux-kernel - Re: [RFC 0/4] [RFC] slub: Fastpath optimization (especially for RT)

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Message-ID: <20141027075426.GE23379@js1304-P5Q-DELUXE>
Date:	Mon, 27 Oct 2014 16:54:26 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	akpm@...uxfoundation.org, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	linux-mm@...ck.org, penberg@...nel.org, iamjoonsoo@....com
Subject: Re: [RFC 0/4] [RFC] slub: Fastpath optimization (especially for RT)

On Fri, Oct 24, 2014 at 09:02:18AM -0500, Christoph Lameter wrote:
> On Fri, 24 Oct 2014, Joonsoo Kim wrote:
> 
> > In this case, object from cpu1's cpu_cache should be
> > different with cpu0's, so allocation would be failed.
> 
> That is true for most object pointers unless the value is NULL. Which it
> can be. But if this is the only case then the second patch + your approach
> would work too.

Indeed... I missed the null value case.
Your second patch + mine would fix that situation, but, I need more
thinking. :)

Thanks.
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