From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754867AbYIWFgd (ORCPT ); Tue, 23 Sep 2008 01:36:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751438AbYIWFgZ (ORCPT ); Tue, 23 Sep 2008 01:36:25 -0400 Received: from gate.crashing.org ([63.228.1.57]:50322 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751395AbYIWFgY (ORCPT ); Tue, 23 Sep 2008 01:36:24 -0400 Subject: Re: PTE access rules & abstraction From: Benjamin Herrenschmidt Reply-To: benh@kernel.crashing.org To: David Miller Cc: npiggin@suse.de, jeremy@goop.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, hugh@veritas.com In-Reply-To: <20080922.201610.246167553.davem@davemloft.net> References: <48D739B2.1050202@goop.org> <1222117551.12085.39.camel@pasglop> <20080923031037.GA11907@wotan.suse.de> <20080922.201610.246167553.davem@davemloft.net> Content-Type: text/plain Date: Tue, 23 Sep 2008 15:35:06 +1000 Message-Id: <1222148106.12085.95.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2008-09-22 at 20:16 -0700, David Miller wrote: > > To a certain extent this is what BSD does in it's pmap layer, except > that they don't have the page table datastructure abstraction like > Linus does in the generic code, and which I think was a smart design > decision on our side. > > All of the pmap modules in BSD are pretty big and duplicate a lot of > code that arch's don't have to be mindful about under Linux. I definitely agree, I don't think we want to go away from the page table as being the abstraction :-) But I'm wondering if we can do a little bit better with the accessors to those page tables. BTW. am I the only one to have got one copy of David's reply (that I'm quoting) coming with a From: Nick Piggin in the headers ? (apparently coming from kvack). Cheers, Ben.