ext3: default to ordered mode

data=writeback mode is dangerous as it leads to higher data loss and stale data
exposure when systems crash. It should not be the default, especially when all
major distros ensure their ext3 filesystems default to ordered mode. Change the
default mode to the safer data=ordered mode, because we should be caring far
more about avoiding stale data exposure than performance.

CC: linux-ext4@vger.kernel.org
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Acked-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/ext3/Kconfig b/fs/ext3/Kconfig
index 522b154..e8c6ba0 100644 (file)
--- a/fs/ext3/Kconfig
+++ b/fs/ext3/Kconfig
@@ -31,6 +31,7 @@ config EXT3_FS
 config EXT3_DEFAULTS_TO_ORDERED
        bool "Default to 'data=ordered' in ext3"
        depends on EXT3_FS
+       default y
        help
          The journal mode options for ext3 have different tradeoffs
          between when data is guaranteed to be on disk and