From: Eric Dumazet <eric.dumazet@xxxxxxxxx> Date: Mon, 02 Mar 2015 11:49:23 -0800 > Size of skb->cb[] is not the major factor. Trying to gain 4 or 8 bytes > is not going to improve performance a lot. > > The real problem is that we clear it in skb_alloc()/build_skb(), instead > of each layer doing so at demand, and only the part that matters for > this layer. > > Basically, skb->cb[] could be 80 or 160 bytes instead of 48, and we > should not care, as long as no layer does a stupid/lazy > > memset(skb->cb, 0, sizeof(skb->cb)) > > Presumably skb_clone() could be extended to receive the length of > skb->cb[] that current layer cares about. Regardless, I think Florian's work has value. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
