From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755983AbcH2TMP (ORCPT ); Mon, 29 Aug 2016 15:12:15 -0400 Received: from g2t1383g.austin.hpe.com ([15.233.16.89]:33904 "EHLO g2t1383g.austin.hpe.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755836AbcH2TMN (ORCPT ); Mon, 29 Aug 2016 15:12:13 -0400 From: Toshi Kani To: akpm@linux-foundation.org Cc: dan.j.williams@intel.com, mawilcox@microsoft.com, ross.zwisler@linux.intel.com, kirill.shutemov@linux.intel.com, david@fromorbit.com, jack@suse.cz, tytso@mit.edu, adilger.kernel@dilger.ca, mike.kravetz@oracle.com, toshi.kani@hpe.com, linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 RESEND 2/2] ext2/4, xfs: call thp_get_unmapped_area() for pmd mappings Date: Mon, 29 Aug 2016 13:11:21 -0600 Message-Id: <1472497881-9323-3-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1472497881-9323-1-git-send-email-toshi.kani@hpe.com> References: <1472497881-9323-1-git-send-email-toshi.kani@hpe.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To support DAX pmd mappings with unmodified applications, filesystems need to align an mmap address by the pmd size. Call thp_get_unmapped_area() from f_op->get_unmapped_area. Note, there is no change in behavior for a non-DAX file. Signed-off-by: Toshi Kani Cc: Andrew Morton Cc: Dan Williams Cc: Matthew Wilcox Cc: Ross Zwisler Cc: Kirill A. Shutemov Cc: Dave Chinner Cc: Jan Kara Cc: Theodore Ts'o Cc: Andreas Dilger Cc: Mike Kravetz --- fs/ext2/file.c | 1 + fs/ext4/file.c | 1 + fs/xfs/xfs_file.c | 1 + 3 files changed, 3 insertions(+) diff --git a/fs/ext2/file.c b/fs/ext2/file.c index 5efeefe..d86831c 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -172,6 +172,7 @@ const struct file_operations ext2_file_operations = { .open = dquot_file_open, .release = ext2_release_file, .fsync = ext2_fsync, + .get_unmapped_area = thp_get_unmapped_area, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, }; diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 261ac37..28f542b 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -703,6 +703,7 @@ const struct file_operations ext4_file_operations = { .open = ext4_file_open, .release = ext4_release_file, .fsync = ext4_sync_file, + .get_unmapped_area = thp_get_unmapped_area, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, .fallocate = ext4_fallocate, diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index e612a02..7f71bb8 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1662,6 +1662,7 @@ const struct file_operations xfs_file_operations = { .open = xfs_file_open, .release = xfs_file_release, .fsync = xfs_file_fsync, + .get_unmapped_area = thp_get_unmapped_area, .fallocate = xfs_file_fallocate, };