On Mon, Jul 16, 2007 at 09:28:08PM +0300, Al Boldi wrote: > Well, conceptually it sounds like a piece of cake, technically your guess is > as good as mine. IIRC, akpm once mentioned something like this. How much have you looked at the VFS? There's nothing journalling-related in the VFS right now. ext3 and XFS share no common journalling code, nor do I think that would be possible, due to the very different concepts they have of journalling. Here's a good hint: $ find fs -type f |xargs grep -l journal_start fs/ext3/acl.c fs/ext3/inode.c fs/ext3/ioctl.c fs/ext3/namei.c fs/ext3/resize.c fs/ext3/super.c fs/ext3/xattr.c fs/ext4/acl.c fs/ext4/extents.c fs/ext4/inode.c fs/ext4/ioctl.c fs/ext4/namei.c fs/ext4/resize.c fs/ext4/super.c fs/ext4/xattr.c fs/jbd/journal.c fs/jbd/transaction.c fs/jbd2/journal.c fs/jbd2/transaction.c fs/ocfs2/journal.c fs/ocfs2/super.c JBD and JBD2 provide a journalling implementation that ext3, ext4 and ocfs2 use. Note that XFS doesn't, it has its own journalling code. If you want XFS to support data=ordered, talk to the XFS folks. Or start picking through XFS yourself, of course -- you do have the source code. -- "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
