Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934132AbbLWTnD (ORCPT ); Wed, 23 Dec 2015 14:43:03 -0500 Received: from mga03.intel.com ([134.134.136.65]:49853 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934072AbbLWTkF (ORCPT ); Wed, 23 Dec 2015 14:40:05 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,470,1444719600"; d="scan'208";a="879950026" 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 , Dave Chinner , Ingo Molnar , Jan Kara , Jeff Layton , Matthew Wilcox , Thomas Gleixner , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@ml01.01.org, x86@kernel.org, xfs@oss.sgi.com, Andrew Morton , Dan Williams , Matthew Wilcox , Dave Hansen Subject: [PATCH v6 6/7] ext4: call dax_pfn_mkwrite() for DAX fsync/msync Date: Wed, 23 Dec 2015 12:39:19 -0700 Message-Id: <1450899560-26708-7-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1450899560-26708-1-git-send-email-ross.zwisler@linux.intel.com> References: <1450899560-26708-1-git-send-email-ross.zwisler@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1292 Lines: 41 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); -- 2.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/