From: Toshi Kani <toshi.kani@hpe.com>
To: akpm@linux-foundation.org, dan.j.williams@intel.com,
viro@zeniv.linux.org.uk
Cc: willy@linux.intel.com, ross.zwisler@linux.intel.com,
kirill.shutemov@linux.intel.com, david@fromorbit.com,
jack@suse.cz, tytso@mit.edu, adilger.kernel@dilger.ca,
linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Toshi Kani <toshi.kani@hpe.com>
Subject: [PATCH v3 2/2] ext2/4, xfs, blk: call dax_get_unmapped_area() for DAX pmd mappings
Date: Thu, 14 Apr 2016 10:48:31 -0600 [thread overview]
Message-ID: <1460652511-19636-3-git-send-email-toshi.kani@hpe.com> (raw)
In-Reply-To: <1460652511-19636-1-git-send-email-toshi.kani@hpe.com>
To support DAX pmd mappings with unmodified applications,
filesystems need to align an mmap address by the pmd size.
Call dax_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 <toshi.kani@hpe.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
---
fs/block_dev.c | 1 +
fs/ext2/file.c | 1 +
fs/ext4/file.c | 1 +
fs/xfs/xfs_file.c | 1 +
4 files changed, 4 insertions(+)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 20a2c02..52518e0 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1798,6 +1798,7 @@ const struct file_operations def_blk_fops = {
.write_iter = blkdev_write_iter,
.mmap = blkdev_mmap,
.fsync = blkdev_fsync,
+ .get_unmapped_area = dax_get_unmapped_area,
.unlocked_ioctl = block_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_blkdev_ioctl,
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index c1400b1..dbf11eb 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 = dax_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 fa2208b..6c268f8 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -708,6 +708,7 @@ const struct file_operations ext4_file_operations = {
.open = ext4_file_open,
.release = ext4_release_file,
.fsync = ext4_sync_file,
+ .get_unmapped_area = dax_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 569938a..1e409a6 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1708,6 +1708,7 @@ const struct file_operations xfs_file_operations = {
.open = xfs_file_open,
.release = xfs_file_release,
.fsync = xfs_file_fsync,
+ .get_unmapped_area = dax_get_unmapped_area,
.fallocate = xfs_file_fallocate,
};
next prev parent reply other threads:[~2016-04-14 16:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-14 16:48 [PATCH v3 0/2] Align mmap address for DAX pmd mappings Toshi Kani
2016-04-14 16:48 ` [PATCH v3 1/2] dax: add dax_get_unmapped_area for " Toshi Kani
2016-04-18 20:47 ` Jan Kara
2016-04-19 2:36 ` Toshi Kani
2016-04-14 16:48 ` Toshi Kani [this message]
2016-04-16 5:05 ` [PATCH v3 0/2] Align mmap address for DAX " Andrew Morton
2016-04-18 20:26 ` Jan Kara
2016-04-19 18:23 ` Matthew Wilcox
2016-04-21 3:10 ` Toshi Kani
2016-04-21 7:06 ` Matthew Wilcox
2016-04-21 20:21 ` Mike Kravetz
2016-04-21 23:43 ` Toshi Kani
2016-04-22 0:22 ` Matthew Wilcox
2016-04-22 0:59 ` Toshi Kani
2016-04-21 23:35 ` Toshi Kani
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