diff options
| author | Andreas Rohner <andreas.rohner@gmx.net> | 2014-10-13 15:53:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-14 02:18:20 +0200 |
| commit | e2c7617ae36b27f97643bfa08aabe27e630c1a76 (patch) | |
| tree | 306dc0642ffbd8c4f837b7fbae960a49116053e6 /fs/nilfs2/file.c | |
| parent | 0f2a84f41aff6cefd1bc768738159d0cacea2f2d (diff) | |
nilfs2: add missing blkdev_issue_flush() to nilfs_sync_fs()
Under normal circumstances nilfs_sync_fs() writes out the super block,
which causes a flush of the underlying block device. But this depends
on the THE_NILFS_SB_DIRTY flag, which is only set if the pointer to the
last segment crosses a segment boundary. So if only a small amount of
data is written before the call to nilfs_sync_fs(), no flush of the
block device occurs.
In the above case an additional call to blkdev_issue_flush() is needed.
To prevent unnecessary overhead, the new flag nilfs->ns_flushed_device
is introduced, which is cleared whenever new logs are written and set
whenever the block device is flushed. For convenience the function
nilfs_flush_device() is added, which contains the above logic.
Signed-off-by: Andreas Rohner <andreas.rohner@gmx.net>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/file.c')
| -rw-r--r-- | fs/nilfs2/file.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 24978153c0c4..e9e3325f29f3 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -56,11 +56,9 @@ int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) mutex_unlock(&inode->i_mutex); nilfs = inode->i_sb->s_fs_info; - if (!err && nilfs_test_opt(nilfs, BARRIER)) { - err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); - if (err != -EIO) - err = 0; - } + if (!err) + err = nilfs_flush_device(nilfs); + return err; } |