tree 83c483a3f55d3f024863e1e33c3ac123e688c868
parent ac6889cbb254be1ffea376bea4a96ce9be0e0ed0
author Chris Mason <chris.mason@oracle.com> 1255452909 -0400
committer Chris Mason <chris.mason@oracle.com> 1255455311 -0400

Btrfs: only write one super copy during fsync

During a tree-log commit for fsync, we've been writing at least
two copies of the super block and forcing them to disk.

The other filesystems write only one, and this change brings us on
par with them.  A full transaction commit will write all the super
copies, so we still have redundant info written on a regular
basis.

Signed-off-by: Chris Mason <chris.mason@oracle.com>