tux3: Fix umount race with flusher
While umount, do_commit can race with umount. So, this checks if need
to commit or not. Otherwise, e.g. sb->logmap can be freed already by
->put_super().
As bonus, if sync/fsync() called when has no dirty inodes, this exits
do_commit() immediately.
FIXME:
- there is no need to commit if normal inodes are not dirty?
(there is no case of internal inodes only dirty?)
- this way may be fragile. ->put_super() should wait to stop flusher?
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
3 files changed
