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>
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- fs/nilfs2/file.c 3 additions, 5 deletionsfs/nilfs2/file.c
- fs/nilfs2/ioctl.c 3 additions, 5 deletionsfs/nilfs2/ioctl.c
- fs/nilfs2/segment.c 3 additions, 0 deletionsfs/nilfs2/segment.c
- fs/nilfs2/super.c 6 additions, 0 deletionsfs/nilfs2/super.c
- fs/nilfs2/the_nilfs.h 22 additions, 0 deletionsfs/nilfs2/the_nilfs.h
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