[PATCH] jbd2: enable building of jbd2 and have ext4 use it rather than jbd

[pandora-kernel.git] / fs / Kconfig

diff --git a/fs/Kconfig b/fs/Kconfig
index ac9ba1c..db4d133 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -143,24 +143,24 @@ config EXT3_FS_SECURITY
 config EXT4DEV_FS
        tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
        depends on EXPERIMENTAL
-        select JBD
-        help
+       select JBD2
+       help
          Ext4dev is a predecessor filesystem of the next generation
          extended fs ext4, based on ext3 filesystem code. It will be
          renamed ext4 fs later, once ext4dev is mature and stabilized.
 
-          Unlike the change from ext2 filesystem to ext3 filesystem,
-          the on-disk format of ext4dev is not the same as ext3 any more:
+         Unlike the change from ext2 filesystem to ext3 filesystem,
+         the on-disk format of ext4dev is not the same as ext3 any more:
          it is based on extent maps and it supports 48-bit physical block
-          numbers. These combined on-disk format changes will allow
+         numbers. These combined on-disk format changes will allow
          ext4dev/ext4 to handle more than 16 TB filesystem volumes --
          a hard limit that ext3 cannot overcome without changing the
-          on-disk format.
+         on-disk format.
 
          Other than extent maps and 48-bit block numbers, ext4dev also is
-          likely to have other new features such as persistent preallocation,
+         likely to have other new features such as persistent preallocation,
          high resolution time stamps, and larger file support etc.  These
-          features will be added to ext4dev gradually.
+         features will be added to ext4dev gradually.
 
          To compile this file system support as a module, choose M here. The
          module will be called ext4dev.  Be aware, however, that the filesystem
@@ -239,6 +239,38 @@ config JBD_DEBUG
          generated.  To turn debugging off again, do
          "echo 0 > /proc/sys/fs/jbd-debug".
 
+config JBD2
+       tristate
+       help
+         This is a generic journaling layer for block devices that support
+         both 32-bit and 64-bit block numbers.  It is currently used by
+         the ext4dev/ext4 filesystem, but it could also be used to add
+         journal support to other file systems or block devices such
+         as RAID or LVM.
+
+         If you are using ext4dev/ext4, you need to say Y here. If you are not
+         using ext4dev/ext4 then you will probably want to say N.
+
+         To compile this device as a module, choose M here. The module will be
+         called jbd2.  If you are compiling ext4dev/ext4 into the kernel,
+         you cannot compile this code as a module.
+
+config JBD2_DEBUG
+       bool "JBD2 (ext4dev/ext4) debugging support"
+       depends on JBD2
+       help
+         If you are using the ext4dev/ext4 journaled file system (or
+         potentially any other filesystem/device using JBD2), this option
+         allows you to enable debugging output while the system is running,
+         in order to help track down any problems you are having.
+         By default, the debugging output will be turned off.
+
+         If you select Y here, then you will be able to turn on debugging
+         with "echo N > /proc/sys/fs/jbd2-debug", where N is a number between
+         1 and 5. The higher the number, the more debugging output is
+         generated.  To turn debugging off again, do
+         "echo 0 > /proc/sys/fs/jbd2-debug".
+
 config FS_MBCACHE
 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
        tristate