From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [patch 1/2]: x86: implement pte_special Date: Thu, 27 Mar 2008 21:16:32 -0700 (PDT) Message-ID: <20080327.211632.02770342.davem@davemloft.net> References: <20080328040442.GE8083@wotan.suse.de> <20080327.210910.101408473.davem@davemloft.net> <20080328041519.GF8083@wotan.suse.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20080328041519.GF8083-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org> Sender: linux-arch-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: npiggin-l3A5Bk7waGM@public.gmane.org Cc: akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, shaggy-V7BBcbaFuwjMbYB6QlFGEg@public.gmane.org, axboe-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org From: Nick Piggin Date: Fri, 28 Mar 2008 05:15:20 +0100 > The other thing is that the "how do I know if I can refcount the page > behind this (mm,vaddr,pte) tuple" can be quite arch specific as well. > And it is also non-trivial to do because that information can be dynamic > depending on what driver mapped in that given tuple. Those are good points. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:49185 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750819AbYC1EQd (ORCPT ); Fri, 28 Mar 2008 00:16:33 -0400 Date: Thu, 27 Mar 2008 21:16:32 -0700 (PDT) Message-ID: <20080327.211632.02770342.davem@davemloft.net> Subject: Re: [patch 1/2]: x86: implement pte_special From: David Miller In-Reply-To: <20080328041519.GF8083@wotan.suse.de> References: <20080328040442.GE8083@wotan.suse.de> <20080327.210910.101408473.davem@davemloft.net> <20080328041519.GF8083@wotan.suse.de> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: npiggin@suse.de Cc: akpm@linux-foundation.org, shaggy@austin.ibm.com, axboe@oracle.com, linux-mm@kvack.org, linux-arch@vger.kernel.org, torvalds@linux-foundation.org Message-ID: <20080328041632.fRWYy7G8UFEOEOT3nMP7klcwuS61M0E01e13Gpd1jyU@z> From: Nick Piggin Date: Fri, 28 Mar 2008 05:15:20 +0100 > The other thing is that the "how do I know if I can refcount the page > behind this (mm,vaddr,pte) tuple" can be quite arch specific as well. > And it is also non-trivial to do because that information can be dynamic > depending on what driver mapped in that given tuple. Those are good points.