Message-ID: <496BCB60.6040504@zytor.com>
Date: Mon, 12 Jan 2009 14:59:44 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
User-Agent: Thunderbird 2.0.0.18 (X11/20081119)
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To: Ingo Molnar <mingo@elte.hu>
CC: Andi Kleen <andi@firstfloor.org>,
       Frederik Deweerdt <frederik.deweerdt@xprog.eu>, tglx@linutronix.de,
       linux-kernel@vger.kernel.org
Subject: Re: [patch] tlb flush_data: replace per_cpu with an array
References: <20090112213539.GA10720@gambetta> <20090112215701.GH23848@one.firstfloor.org> <20090112224037.GA16585@elte.hu>
In-Reply-To: <20090112224037.GA16585@elte.hu>
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Ingo Molnar wrote:

>> Nope it doesn't save memory on most systems because per cpu is only 
>> allocated based on the CPUs that are actually there. And if you have 
>> more than 8 cores you can likely afford a few bytes per CPU.
> 
> No distro kernel will build with less than 8 CPUs anyway so this point is 
> moot.

Except for embedded, which will build for exactly what's in the box.

	-hpa
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