On Sat, Jan 22, 2022 at 10:32:16AM -0500, Willem de Bruijn wrote: > > + * delivery_time in mono clock base (i.e. EDT). Otherwise, the > > + * skb->tstamp has the (rcv) timestamp at ingress and > > + * delivery_time at egress. > > * @napi_id: id of the NAPI struct this skb came from > > * @sender_cpu: (aka @napi_id) source CPU in XPS > > * @secmark: security marking > > @@ -890,6 +894,7 @@ struct sk_buff { > > __u8 decrypted:1; > > #endif > > __u8 slow_gro:1; > > + __u8 mono_delivery_time:1; > > This bit fills a hole, does not change sk_buff size, right? [ Sorry, cut too much when sending the last reply ] Correct. With this +1 bit, it still has a 3 bits and a 1 byte hole before tc_index when every CONFIG_* among these bits are turned on.