On Thu, 2010-03-25 at 14:33 +0800, Kalle Valo wrote:
> Zhu Yi <yi.zhu@xxxxxxxxx> writes:
>
> > Mac80211 drivers can now pass paged SKBs to mac80211 via
> > ieee80211_rx{_irqsafe}. The implementation currently use
> > skb_linearize() in a few places i.e. management frame handling,
> > software decryption, defragmentation and A-MSDU process. We can
> > optimize them one by one later.
>
> I think ieee80211_rx{_irqsafe} documentation should now mention that
> paged skbs are supported. Better to make this suppot explicit for the
> driver authors.
Good idea it should be documented somewhere (after the patch is
accepted). Maybe the developer wiki page? For the code itself, I think
Linux drivers can always assume the network stacks support paged
buffers. In case some stack doesn't support paged buffer, it should do
skb_linearize() itself in the very beginning of its rcv handling (e.g.
sctp_rcv, tipc_recv_msg, etc).
Thanks,
-yi
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