On Tue, Oct 16, 2012 at 8:47 AM, Gleb Smirnoff <glebius at freebsd.org> wrote: > Can you please provide hints how can SIOCADDMULTI lead to obtaining RX > lock in the stock driver? It doesn't. But it does acquire the core lock, and the core lock is acquired before the RX lock (in ixgbe_init, for instance).