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Subject[PATCH] Remove EXPERIMENTAL flag from Btrfs

Resubmitting, as it doesn't seem to be upstream yet.

Remove EXPERIMENTAL flag from btrfs and also state that the disk format
has indeed been finalized.

Signed-off-by: Christian Kujau <>

diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt
index 64087c3..da67070 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.txt
@@ -12,9 +12,9 @@ number of challenges with scaling to the large storage subsystems that
are becoming common in today's data centers. Filesystems need to scale
in their ability to address and manage large storage, and also in
their ability to detect, repair and tolerate errors in the data stored
-on disk. Btrfs is under heavy development, and is not suitable for
-any uses other than benchmarking and review. The Btrfs disk format is
-not yet finalized.
+on disk. Btrfs is under heavy development, but with Linux 2.6.31 the
+Btrfs disk format has been finalized and is not considered experimental
+any more.

The main Btrfs features include:

@@ -33,6 +33,7 @@ The main Btrfs features include:
* Efficient incremental backup and FS mirroring (not yet implemented)
* Online filesystem defragmentation

+Please see for details on these features.

diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index 7bb3c02..cebb197 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -1,16 +1,12 @@
config BTRFS_FS
- tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format"
- depends on EXPERIMENTAL
+ tristate "Btrfs filesystem"
select LIBCRC32C
Btrfs is a new filesystem with extents, writable snapshotting,
- support for multiple devices and many more features.
- Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET
- FINALIZED. You should say N here unless you are interested in
- testing Btrfs with non-critical data.
+ support for multiple devices and many more features. For more
+ information, please see

To compile this file system support as a module, choose M here. The
module will be called btrfs.
BOFH excuse #186:
permission denied

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