From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261791AbVF1NuZ (ORCPT ); Tue, 28 Jun 2005 09:50:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261772AbVF1NuY (ORCPT ); Tue, 28 Jun 2005 09:50:24 -0400 Received: from embeddededge.com ([209.113.146.155]:64778 "EHLO penguin.netx4.com") by vger.kernel.org with ESMTP id S261675AbVF1Nta (ORCPT ); Tue, 28 Jun 2005 09:49:30 -0400 In-Reply-To: <1119939689.5133.200.camel@gaston> References: <20050626172334.GA5786@logos.cnet> <20050626164939.2f457bf6.akpm@osdl.org> <20050626185210.GB6091@logos.cnet> <20050626.173338.41634345.davem@davemloft.net> <20050626190944.GC6091@logos.cnet> <6a3846d2436994d94aeacb0b0850d5f5@embeddededge.com> <1119939689.5133.200.camel@gaston> Mime-Version: 1.0 (Apple Message framework v622) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <6dcc5f35c031c4d6c8ef1d133e5bb53d@embeddededge.com> Content-Transfer-Encoding: 7bit Cc: akpm@osdl.org, Marcelo Tosatti , "David S. Miller" , linux-kernel@vger.kernel.org From: Dan Malek Subject: Re: increased translation cache footprint in v2.6 Date: Tue, 28 Jun 2005 09:49:18 -0400 To: Benjamin Herrenschmidt X-Mailer: Apple Mail (2.622) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Jun 28, 2005, at 2:21 AM, Benjamin Herrenschmidt wrote: > How so ? the linux page table structure allow you to format the PTE and > PMD contents pretty much the way you want ... Pretty much the way, but not exactly :-) > Paul told me the 8xx has some restrictions about what goes at the "PMD" > level that is a problem for us (is it cache inhibited bit ?) and thus > we > cannot completely do the PMD/PTE thingy, There are some page control options that would be easier handled at the pmd boundary. Cache mode is one of them. -- Dan