David I am staring at ip6_dst_destroy() and the last part makes really no sense to me.
How rcu_read_lock()/rcu_read_unnlock() can help in a writer side ???
Changlog of a68886a691804d3f6d479ebf6825480fbafb6a00 ("net/ipv6: Make from in
rt6_info rcu protected")
does not make sense either.
<quote>
There is a race window when a FIB entry is deleted and the 'from' on the
pcpu route is dropped and the pcpu route hits a cookie check. Handle
this race using rcu on from.
</quote>
