On 10/14/19 1:26 PM, Martin Lau wrote: > > AFAICT, even for the route that are affected by > fib6_update_sernum_upto_root(), > I don't see the RTF_PCPU route is re-created. v6 sk does > dst_check() => re-lookup the fib6 => > found the same RTF_PCPU (but does not re-create it) => > update the sk with new cookie in ip6_dst_store() >
That's fine. The pcpu cache is per nexthop (fib6_nh) for a specific gateway/device. The invalidate forces another lookup for the intended destination after the change to the fib. If the lookup resolves to the same fib entry and nexthop, then re-using the same cached dst/rt6_info is ok.
