From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765701AbYEHQwV (ORCPT ); Thu, 8 May 2008 12:52:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758134AbYEHQwG (ORCPT ); Thu, 8 May 2008 12:52:06 -0400 Received: from outbound-wa4.frontbridge.com ([216.32.181.16]:58373 "EHLO outbound6-wa4-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754080AbYEHQwE (ORCPT ); Thu, 8 May 2008 12:52:04 -0400 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 139.95.251.11;Service: EHS X-WSS-ID: 0K0K6UD-03-3ML-01 Date: Thu, 8 May 2008 18:51:11 +0200 From: Hans Rosenfeld To: Nishanth Aravamudan Cc: Dave Hansen , Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508165111.GI12654@escobedo.amd.com> References: <20080506202201.GB12654@escobedo.amd.com> <1210106579.4747.51.camel@nimitz.home.sr71.net> <20080508143453.GE12654@escobedo.amd.com> <1210258350.7905.45.camel@nimitz.home.sr71.net> <20080508151145.GG12654@escobedo.amd.com> <1210261882.7905.49.camel@nimitz.home.sr71.net> <20080508161925.GH12654@escobedo.amd.com> <20080508163352.GN23990@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080508163352.GN23990@us.ibm.com> User-Agent: Mutt/1.4.2.3i X-OriginalArrivalTime: 08 May 2008 16:51:08.0687 (UTC) FILETIME=[B6B1B9F0:01C8B12B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 08, 2008 at 09:33:52AM -0700, Nishanth Aravamudan wrote: > So this seems to lend credence to Dave's hypothesis. Without, as you > were trying before, teaching pagemap all about hugepages, what are our > options? > > Can we just skip over the current iteration of the PMD loop (would we > need something similar for the PTE loop for power?) if pmd_huge(pmd)? Allowing huge pages in the page walker would affect both walk_pmd_range and walk_pud_range. Then either the users of the page walker need to know how to handle huge pages themselves (in the pmd_entry and pud_entry callback functions), or the page walker treats huge pages as any other pages (calling the pte_entry callback function). -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 8 May 2008 18:51:11 +0200 From: Hans Rosenfeld Subject: Re: [PATCH] x86: fix PAE pmd_bad bootup warning Message-ID: <20080508165111.GI12654@escobedo.amd.com> References: <20080506202201.GB12654@escobedo.amd.com> <1210106579.4747.51.camel@nimitz.home.sr71.net> <20080508143453.GE12654@escobedo.amd.com> <1210258350.7905.45.camel@nimitz.home.sr71.net> <20080508151145.GG12654@escobedo.amd.com> <1210261882.7905.49.camel@nimitz.home.sr71.net> <20080508161925.GH12654@escobedo.amd.com> <20080508163352.GN23990@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080508163352.GN23990@us.ibm.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Nishanth Aravamudan Cc: Dave Hansen , Hugh Dickins , Ingo Molnar , Jeff Chua , Thomas Gleixner , "H. Peter Anvin" , Gabriel C , Arjan van de Ven , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Thu, May 08, 2008 at 09:33:52AM -0700, Nishanth Aravamudan wrote: > So this seems to lend credence to Dave's hypothesis. Without, as you > were trying before, teaching pagemap all about hugepages, what are our > options? > > Can we just skip over the current iteration of the PMD loop (would we > need something similar for the PTE loop for power?) if pmd_huge(pmd)? Allowing huge pages in the page walker would affect both walk_pmd_range and walk_pud_range. Then either the users of the page walker need to know how to handle huge pages themselves (in the pmd_entry and pud_entry callback functions), or the page walker treats huge pages as any other pages (calling the pte_entry callback function). -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org