Re: [ANNOUNCE] Btrfs: a copy on write, snapshotting FS

[Chris Mason <chris.mason@oracle.com>]

On Fri, Jun 15, 2007 at 10:46:04PM +0200, Florian D. wrote:
> Chris Mason wrote:
> >> # umount /mnt/temp/
> >>
> >> [  457.980372] ------------[ cut here ]------------
> >> [  457.980377] kernel BUG at fs/buffer.c:2644!
> > 
> > Whoops.  Please try this:

[ bad patch ]

> sorry, with the patch applied:
> 
> [  147.475077] BUG: at
> /home/florian/system/btrfs_test/btrfs-0.2/disk-io.c:534

Well, apparently I get get the silly stuff wrong an infinite number of
times.  Sorry, lets try again:

diff -r 38b36aaaa731 disk-io.c
--- a/disk-io.c	Fri Jun 15 13:50:20 2007 -0400
+++ b/disk-io.c	Fri Jun 15 16:52:38 2007 -0400
@@ -541,6 +541,8 @@ int write_ctree_super(struct btrfs_trans
 	else
 		ret = submit_bh(WRITE, bh);
 	if (ret == -EOPNOTSUPP) {
+		get_bh(bh);
+		lock_buffer(bh);
 		set_buffer_uptodate(bh);
 		root->fs_info->do_barriers = 0;
 		ret = submit_bh(WRITE, bh);