diff options
| author | Andreas Rohner | 2014-10-13 15:53:20 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2014-10-14 02:18:20 +0200 |
| commit | e2c7617ae36b27f97643bfa08aabe27e630c1a76 (patch) | |
| tree | 306dc0642ffbd8c4f837b7fbae960a49116053e6 /fs/nilfs2/segment.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/segment.c')
| -rw-r--r-- | fs/nilfs2/segment.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index a1a191634abc..0b7d2cad0426 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -1833,6 +1833,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) nilfs_set_next_segment(nilfs, segbuf); if (update_sr) { + nilfs->ns_flushed_device = 0; nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start, segbuf->sb_sum.seg_seq, nilfs->ns_cno++); @@ -2216,6 +2217,8 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode, sci->sc_dsync_end = end; err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); + if (!err) + nilfs->ns_flushed_device = 0; nilfs_transaction_unlock(sb); return err; |