From patchwork Wed Jan 6 18:01:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 7969261 Return-Path: X-Original-To: patchwork-linux-nvdimm@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 1F69C9F1C0 for ; Wed, 6 Jan 2016 18:01:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 52B5B20154 for ; Wed, 6 Jan 2016 18:01:28 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 84C3020145 for ; Wed, 6 Jan 2016 18:01:27 +0000 (UTC) Received: from ml01.vlan14.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 79F4C1A22B7; Wed, 6 Jan 2016 10:01:27 -0800 (PST) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by ml01.01.org (Postfix) with ESMTP id 30C121A22C7 for ; Wed, 6 Jan 2016 10:01:26 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 06 Jan 2016 10:01:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,530,1444719600"; d="scan'208";a="885040488" Received: from rzwisler-desk.amr.corp.intel.com (HELO phyrexia.intel.com) ([10.252.201.208]) by orsmga002.jf.intel.com with ESMTP; 06 Jan 2016 10:01:22 -0800 From: Ross Zwisler To: linux-kernel@vger.kernel.org Subject: [PATCH v7 9/9] xfs: call dax_pfn_mkwrite() for DAX fsync/msync Date: Wed, 6 Jan 2016 11:01:03 -0700 Message-Id: <1452103263-1592-10-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1452103263-1592-1-git-send-email-ross.zwisler@linux.intel.com> References: <1452103263-1592-1-git-send-email-ross.zwisler@linux.intel.com> Cc: Dave Hansen , Dave Chinner , "J. Bruce Fields" , linux-mm@kvack.org, Andreas Dilger , "H. Peter Anvin" , Jeff Layton , linux-nvdimm@lists.01.org, x86@kernel.org, Ingo Molnar , linux-ext4@vger.kernel.org, xfs@oss.sgi.com, Alexander Viro , Thomas Gleixner , Theodore Ts'o , Jan Kara , linux-fsdevel@vger.kernel.org, Andrew Morton , Matthew Wilcox X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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 --- fs/xfs/xfs_file.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index ebe9b82..55e16e2 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1610,9 +1610,8 @@ xfs_filemap_pmd_fault( /* * pfn_mkwrite was originally inteneded to ensure we capture time stamp * updates on write faults. In reality, it's need to serialise against - * truncate similar to page_mkwrite. Hence we open-code dax_pfn_mkwrite() - * here and cycle the XFS_MMAPLOCK_SHARED to ensure we serialise the fault - * barrier in place. + * truncate similar to page_mkwrite. Hence we cycle the XFS_MMAPLOCK_SHARED + * to ensure we serialise the fault barrier in place. */ static int xfs_filemap_pfn_mkwrite( @@ -1635,6 +1634,8 @@ xfs_filemap_pfn_mkwrite( size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; if (vmf->pgoff >= size) ret = VM_FAULT_SIGBUS; + else if (IS_DAX(inode)) + ret = dax_pfn_mkwrite(vma, vmf); xfs_iunlock(ip, XFS_MMAPLOCK_SHARED); sb_end_pagefault(inode->i_sb); return ret;