On Jan 11, 2008 3:17 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > 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()? > This would be great even in regular case. 4965 has ability to deliver more frames per receiving buffer Because of A-MSDU we keeps 8K receiving buffers which are underutilized when A-MSDU is not used. > johannes > - 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
