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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>
This commit is contained in:
Chris Mason 2009-10-13 12:55:09 -04:00
parent ac6889cbb2
commit 4722607db6
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/tree-log.c
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@ -2092,7 +2092,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
* the running transaction open, so a full commit can't hop
* in and cause problems either.
*/
write_ctree_super(trans, root->fs_info->tree_root, 2);
write_ctree_super(trans, root->fs_info->tree_root, 1);
ret = 0;
out_wake_log_root: