On Mon, Sep 11, 2017 at 11:05:23PM -0600, Ross Zwisler wrote: > The current code has the potential for data corruption when changing an > inode's journaling mode, as that can result in a subsequent unsafe change > in S_DAX. > > I've captured an instance of this data corruption in the following fstest: > > https://patchwork.kernel.org/patch/9948377/ > > Prevent this data corruption from happening by disallowing changes to the > journaling mode if the '-o dax' mount option was used. This means that for > a given filesystem we could have a mix of inodes using either DAX or > data journaling, but whatever state the inodes are in will be held for the > duration of the mount. > > Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx> > Suggested-by: Jan Kara <jack@xxxxxxx> Thanks, applied. - Ted
