linux-kernel - Re: [RFC 00/15] x86_64: Optimize percpu accesses

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Message-ID: <m1hcawgxyl.fsf@frodo.ebiederm.org>
Date:	Fri, 11 Jul 2008 09:57:54 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Mike Travis <travis@....com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses


> x86_64 are small systems? For 64 bit use one would expect 4GB of memory.

Anything over 1G where 32bit runs out of lowmem starts to be a win.
Plus sometimes it just doesn't make sense to use a 32bit kernel.

Expecting 4GB of real memory seems silly.

Eric

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