In article [ref] (at Mon, 14 Mar 2005 21:25:57 -0800), "David S. Miller" [off-list ref] says:

quoted

I was going to do the same thing to IPv6.  Unfortunately it seems
that we don't have any local_df support over there.  That is, we
always fragment outbound UDP/raw packets.  Did I miss something?

I have no idea offhand.  Perhaps Yoshifuji can figure it out?

Currently, yes.
And, I know this is one of places we may need to revisit...

--yoshfuji