In 802.11n, there is a case where multiple data frames are received aggregated into a single frame (A-MSDU). Currently, we copy each of these frames out into their own skb, but because of the alignment with that etc. I started to think that we could simply pass up a clone of the original skb with start/length adjusted properly so that it windows only the contained packet. The buffer would be shared but the data within the original window (starting with the 802.3 header) could even be written to, it won't be needed again by mac80211 once it's handed off to netif_rx(). The skb will obviously have lots of head- and tailroom but that space would be part of other packets. Is it ok to do this? Will something freak out if we pass a cloned skb to netif_rx()? johannes
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