Date: Mon, 23 Nov 2009 09:34:59 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Nick Piggin <npiggin@suse.de>, Jan Beulich <JBeulich@novell.com>,
       tglx@linutronix.de, linux-kernel@vger.kernel.org, hpa@zytor.com,
       Ravikiran Thirumalai <kiran@scalex86.org>,
       Shai Fultheim <shai@scalemp.com>
Subject: Re: [PATCH] x86: eliminate redundant/contradicting cache line size
 config options
Message-ID: <20091123083459.GB11443@elte.hu>
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 <20091116041407.GB5818@wotan.suse.de>
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 <20091116105657.GE5818@wotan.suse.de>
 <20091119035640.GA18236@elte.hu>
 <20091118205240.11d3d660@infradead.org>
 <20091119081307.GA20534@wotan.suse.de>
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* Arjan van de Ven <arjan@infradead.org> wrote:

> On Thu, 19 Nov 2009 09:13:07 +0100
> Nick Piggin <npiggin@suse.de> wrote:
> > 
> > My other point was just this, but I don't care too much. But it is
> > worded pretty negatively. The key here is that increasing the value
> > too large tends to only cost a very small amount of size (and no
> > increase in cacheline foot print, only RAM). 
> 
> 128 has a pretty significant impact on TPC-C benchmarks.....
> it was the top issue until mainline fixed it to default to 64

Mind sending a patch that sets the default to 64 on NUMA too?

P4 based NUMA boxes are ... a bad memory to be forgotten.

	Ingo
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