From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B09F6C43331 for ; Tue, 12 Nov 2019 06:52:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F90C206A5 for ; Tue, 12 Nov 2019 06:52:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727402AbfKLGwf (ORCPT ); Tue, 12 Nov 2019 01:52:35 -0500 Received: from foss.arm.com ([217.140.110.172]:56522 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727399AbfKLGwe (ORCPT ); Tue, 12 Nov 2019 01:52:34 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 741C81FB; Mon, 11 Nov 2019 22:52:33 -0800 (PST) Received: from [10.163.1.187] (unknown [10.163.1.187]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6BA6A3F52E; Mon, 11 Nov 2019 22:55:07 -0800 (PST) Subject: Re: [PATCH V9] mm/debug: Add tests validating architecture page table helpers To: Ingo Molnar Cc: linux-mm@kvack.org, Andrew Morton , Vlastimil Babka , Greg Kroah-Hartman , Thomas Gleixner , Mike Rapoport , Jason Gunthorpe , Dan Williams , Peter Zijlstra , Michal Hocko , Mark Rutland , Mark Brown , Steven Price , Ard Biesheuvel , Masahiro Yamada , Kees Cook , Tetsuo Handa , Matthew Wilcox , Sri Krishna chowdary , Dave Hansen , Russell King - ARM Linux , Michael Ellerman , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Vineet Gupta , James Hogan , Paul Burton , Ralf Baechle , "Kirill A . Shutemov" , Gerald Schaefer , Christophe Leroy , linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org References: <1573532326-24084-1-git-send-email-anshuman.khandual@arm.com> <20191112062951.GA100264@gmail.com> From: Anshuman Khandual Message-ID: Date: Tue, 12 Nov 2019 12:22:45 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20191112062951.GA100264@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On 11/12/2019 11:59 AM, Ingo Molnar wrote: > > * Anshuman Khandual wrote: > >> +config DEBUG_VM_PGTABLE >> + bool "Debug arch page table for semantics compliance" >> + depends on MMU >> + depends on DEBUG_VM >> + depends on ARCH_HAS_DEBUG_VM_PGTABLE >> + help >> + This option provides a debug method which can be used to test >> + architecture page table helper functions on various platforms in >> + verifying if they comply with expected generic MM semantics. This >> + will help architecture code in making sure that any changes or >> + new additions of these helpers still conform to expected >> + semantics of the generic MM. >> + >> + If unsure, say N. > > Since CONFIG_DEBUG_VM is generally disabled in distro kernel packages, > why not make this 'default y' to maximize testing coverage? The code size > increase should be minimal, and DEBUG_VM increases size anyway. Sure, will do. > > Other than that this looks good to me: > > Reviewed-by: Ingo Molnar Thank you. > > Thanks, > > Ingo >