linux-kernel - Re: x86: 4kstacks default

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Date:	Sun, 20 Apr 2008 22:32:19 +0200
From:	Jörn Engel <joern@...fs.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Willy Tarreau <w@....eu>, Mark Lord <lkml@....ca>,
	Adrian Bunk <bunk@...nel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Shawn Bohrer <shawn.bohrer@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: x86: 4kstacks default

On Sun, 20 April 2008 20:19:30 +0200, Andi Kleen wrote:
> > 
> >>> When dealing in those dimensions, savings of 100k are substantial.  In
> >>> some causes they may be the difference between 16MiB or 32MiB, which
> >>> translates to manufacturing costs.  In others it simply means that the
> >>> system can cache 
> >> If you need the stack you don't have any less cache foot print.
> >> If you don't need it you don't have any either.
> > 
> > This part I don't understand.
> 
> I was just objecting to your claim that small stack implies smaller
> cache foot print.

The cache I referred to is called DRAM, not L1.

Jörn

-- 
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