From patchwork Fri Jan 8 05:27:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 7982611 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BD9919F1CC for ; Fri, 8 Jan 2016 05:29:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EEB752013D for ; Fri, 8 Jan 2016 05:29:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E1C020138 for ; Fri, 8 Jan 2016 05:29:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753983AbcAHF3I (ORCPT ); Fri, 8 Jan 2016 00:29:08 -0500 Received: from mga14.intel.com ([192.55.52.115]:53828 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751780AbcAHF20 (ORCPT ); Fri, 8 Jan 2016 00:28:26 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP; 07 Jan 2016 21:28:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,536,1444719600"; d="scan'208";a="25714004" Received: from rzwisler-desk.amr.corp.intel.com (HELO phyrexia.intel.com) ([10.252.201.208]) by fmsmga004.fm.intel.com with ESMTP; 07 Jan 2016 21:28:24 -0800 From: Ross Zwisler To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , "H. Peter Anvin" , "J. Bruce Fields" , "Theodore Ts'o" , Alexander Viro , Andreas Dilger , Andrew Morton , Dan Williams , Dave Chinner , Dave Hansen , Ingo Molnar , Jan Kara , Jeff Layton , Matthew Wilcox , Matthew Wilcox , Thomas Gleixner , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@lists.01.org, x86@kernel.org, xfs@oss.sgi.com Subject: [PATCH v8 8/9] ext4: call dax_pfn_mkwrite() for DAX fsync/msync Date: Thu, 7 Jan 2016 22:27:58 -0700 Message-Id: <1452230879-18117-9-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1452230879-18117-1-git-send-email-ross.zwisler@linux.intel.com> References: <1452230879-18117-1-git-send-email-ross.zwisler@linux.intel.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP To properly support the new DAX fsync/msync infrastructure filesystems need to call dax_pfn_mkwrite() so that DAX can track when user pages are dirtied. Signed-off-by: Ross Zwisler Reviewed-by: Jan Kara --- fs/ext4/file.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 60683ab..fa899c9 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -291,8 +291,8 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma, { struct inode *inode = file_inode(vma->vm_file); struct super_block *sb = inode->i_sb; - int ret = VM_FAULT_NOPAGE; loff_t size; + int ret; sb_start_pagefault(sb); file_update_time(vma->vm_file); @@ -300,6 +300,8 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma, size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; + else + ret = dax_pfn_mkwrite(vma, vmf); up_read(&EXT4_I(inode)->i_mmap_sem); sb_end_pagefault(sb);