Re: PostgreSQL's handling of fsync() errors is unsafe and risks data loss at least on XFS

Now, I hear the DIRECT_IO thing and I assume we're eventually going to
have to go that way: Linux kernel developers seem to think that "real
men use O_DIRECT" and so if other forms of I/O don't provide useful
guarantees, well that's our fault for not using O_DIRECT.  That's a
political reason, not a technical reason, but it's a reason all the
same.