From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f41.google.com (mail-pa0-f41.google.com [209.85.220.41]) by kanga.kvack.org (Postfix) with ESMTP id A78846B0005 for ; Tue, 16 Feb 2016 10:49:14 -0500 (EST) Received: by mail-pa0-f41.google.com with SMTP id fy10so65851825pac.1 for ; Tue, 16 Feb 2016 07:49:14 -0800 (PST) Received: from mga03.intel.com (mga03.intel.com. [134.134.136.65]) by mx.google.com with ESMTP id un7si51853122pac.228.2016.02.16.07.49.13 for ; Tue, 16 Feb 2016 07:49:13 -0800 (PST) Subject: Re: [PATCHv2 19/28] thp: run vma_adjust_trans_huge() outside i_mmap_rwsem References: <1455200516-132137-1-git-send-email-kirill.shutemov@linux.intel.com> <1455200516-132137-20-git-send-email-kirill.shutemov@linux.intel.com> From: Dave Hansen Message-ID: <56C344F7.8070107@intel.com> Date: Tue, 16 Feb 2016 07:49:11 -0800 MIME-Version: 1.0 In-Reply-To: <1455200516-132137-20-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: > vma_addjust_trans_huge() splits pmd if it's crossing VMA boundary. > During split we munlock the huge page which requires rmap walk. > rmap wants to take the lock on its own. Ahhh, ... so we $SUBJECT in order to fix it. Now it all makes sense. Maybe I'm old fashioned, but I tend to have forgotten $SUBJECT by the time I start to read the patch body text. It's really handy for me when the body text stands on its own. -- 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