From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f50.google.com (mail-pa0-f50.google.com [209.85.220.50]) by kanga.kvack.org (Postfix) with ESMTP id 522776B0009 for ; Fri, 12 Feb 2016 13:33:40 -0500 (EST) Received: by mail-pa0-f50.google.com with SMTP id fl4so38605888pad.0 for ; Fri, 12 Feb 2016 10:33:40 -0800 (PST) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTP id u10si21443075pfa.95.2016.02.12.10.33.39 for ; Fri, 12 Feb 2016 10:33:39 -0800 (PST) Subject: Re: [PATCHv2 13/28] thp: support file pages in zap_huge_pmd() References: <1455200516-132137-1-git-send-email-kirill.shutemov@linux.intel.com> <1455200516-132137-14-git-send-email-kirill.shutemov@linux.intel.com> From: Dave Hansen Message-ID: <56BE2581.6070901@intel.com> Date: Fri, 12 Feb 2016 10:33:37 -0800 MIME-Version: 1.0 In-Reply-To: <1455200516-132137-14-git-send-email-kirill.shutemov@linux.intel.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" , Hugh Dickins , Andrea Arcangeli , Andrew Morton Cc: Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Jerome Marchand , Yang Shi , Sasha Levin , linux-kernel@vger.kernel.org, linux-mm@kvack.org On 02/11/2016 06:21 AM, Kirill A. Shutemov wrote: > For file pages we don't deposit page table on mapping: no need to > withdraw it. I thought the deposit thing was to guarantee we could always do a PMD split. It still seems like if you wanted to split a huge-tmpfs page, you'd need to first split the PMD which might need the deposited one. Why not? -- 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