Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761844AbYJMN23 (ORCPT ); Mon, 13 Oct 2008 09:28:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757136AbYJMN2V (ORCPT ); Mon, 13 Oct 2008 09:28:21 -0400 Received: from fg-out-1718.google.com ([72.14.220.158]:37026 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756407AbYJMN2U (ORCPT ); Mon, 13 Oct 2008 09:28:20 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding :content-disposition:message-id; b=QFyt1n8Mmrs2lGVm6Nav/q8Be/yHmERqnDEAI9raq42qYiXHLAal/pOouRMXDEPQg4 +lRtdDwRSoiNNHK2bdx6N00bSYJqv9vfG5W2u9QzmJwyuQ9GHVBBcFL0Y8YD5LkTxqCg ScLBwt6s2bDRlktAg4l9lR24qyDSFGXSTgVNc= From: Eric Lacombe To: Andi Kleen Subject: Re: [x86_64] Implementation differences compared to x86_32 Date: Mon, 13 Oct 2008 15:28:17 +0200 User-Agent: KMail/1.9.9 Cc: Jeremy Fitzhardinge , linux-kernel@vger.kernel.org References: <200810131426.20075.goretux@gmail.com> <87vdvwr6k9.fsf@basil.nowhere.org> In-Reply-To: <87vdvwr6k9.fsf@basil.nowhere.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200810131528.17115.goretux@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 681 Lines: 18 On Monday 13 October 2008 15:03:02 Andi Kleen wrote: > Eric Lacombe writes: > > - In x86_32, the physical memory is mapped on kernel land by way of 4 MB > > pages. > > But for x86_64, I read that the physical memory was mapped by way of 4 KB > > pages. Is it true ? and in this case, why this choice ? > > It's normally not true (except in some special circumstances) What are these particular circumstances ? Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/