Eric Dumazet <eric.duma...@gmail.com> wrote: > > > On 12/13/2018 02:39 AM, Florian Westphal wrote: > > > > Thats whats done in the MPTCP out-of-tree implementation, but I don't > > think its needed. > > > > It could just delete the extension before ->queue_xmit() AFAIU. > > So, cloning would do an refcount_inc(), and deleting the extension would do > an refcount_dec_and_test() ? > > That is what I called an extra pair of atomic operations.
If it replaces 1:1 current mptcp skb->private out-of-tree storage, then yes.
