Hi, David,

On 2016/01/05 23:12, David Sterba wrote:

On Wed, Dec 16, 2015 at 11:57:38AM +0900, Tsutomu Itoh wrote:

quoted

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 974be09..dcc1f15 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c

@@ -2709,7 +2709,7 @@ int open_ctree(struct super_block *sb,
  	 * In the long term, we'll store the compression type in the super
  	 * block, and it'll be used for per file compression control.
  	 */
-	fs_info->compress_type = BTRFS_COMPRESS_ZLIB;
+	fs_info->compress_type = BTRFS_COMPRESS_NONE;

This would change the default compression type, eg. when the compression
is turned on via chattr +c . This would break the applications out
there, the fix has to avoid changing that.

Thanks for pointing that out. I had forgotten chattr +c.
I'll post V2 patch later.

Thanks,
Tsutomu