From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: Re: [PATCHv4 29/39] thp: move maybe_pmd_mkwrite() out of mk_huge_pmd() Date: Wed, 22 May 2013 07:56:59 -0700 Message-ID: <519CDCBB.7050807@sr71.net> References: <1368321816-17719-1-git-send-email-kirill.shutemov@linux.intel.com> <1368321816-17719-30-git-send-email-kirill.shutemov@linux.intel.com> <519C01D8.4040301@sr71.net> <20130522143746.A7CE5E0090@blue.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Andrea Arcangeli , Andrew Morton , Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: "Kirill A. Shutemov" Return-path: In-Reply-To: <20130522143746.A7CE5E0090@blue.fi.intel.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On 05/22/2013 07:37 AM, Kirill A. Shutemov wrote: > Dave Hansen wrote: >> On 05/11/2013 06:23 PM, Kirill A. Shutemov wrote: >>> From: "Kirill A. Shutemov" >>> >>> It's confusing that mk_huge_pmd() has sematics different from mk_pte() >>> or mk_pmd(). >>> >>> Let's move maybe_pmd_mkwrite() out of mk_huge_pmd() and adjust >>> prototype to match mk_pte(). >> >> Was there a motivation to do this beyond adding consistency? Do you use >> this later or something? > > I spent some time on debugging problem caused by this inconsistency, so at > that point I was motivated to fix it. :) A little anecdote that this bit you in practice to help indicate this isn't just random code churn would be nice. -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756522Ab3EVO5F (ORCPT ); Wed, 22 May 2013 10:57:05 -0400 Received: from www.sr71.net ([198.145.64.142]:52492 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756477Ab3EVO5C (ORCPT ); Wed, 22 May 2013 10:57:02 -0400 Message-ID: <519CDCBB.7050807@sr71.net> Date: Wed, 22 May 2013 07:56:59 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: "Kirill A. Shutemov" CC: Andrea Arcangeli , Andrew Morton , Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv4 29/39] thp: move maybe_pmd_mkwrite() out of mk_huge_pmd() References: <1368321816-17719-1-git-send-email-kirill.shutemov@linux.intel.com> <1368321816-17719-30-git-send-email-kirill.shutemov@linux.intel.com> <519C01D8.4040301@sr71.net> <20130522143746.A7CE5E0090@blue.fi.intel.com> In-Reply-To: <20130522143746.A7CE5E0090@blue.fi.intel.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/22/2013 07:37 AM, Kirill A. Shutemov wrote: > Dave Hansen wrote: >> On 05/11/2013 06:23 PM, Kirill A. Shutemov wrote: >>> From: "Kirill A. Shutemov" >>> >>> It's confusing that mk_huge_pmd() has sematics different from mk_pte() >>> or mk_pmd(). >>> >>> Let's move maybe_pmd_mkwrite() out of mk_huge_pmd() and adjust >>> prototype to match mk_pte(). >> >> Was there a motivation to do this beyond adding consistency? Do you use >> this later or something? > > I spent some time on debugging problem caused by this inconsistency, so at > that point I was motivated to fix it. :) A little anecdote that this bit you in practice to help indicate this isn't just random code churn would be nice.