Re: mac80211 truesize bugs

Johannes Berg
2008-05-04T16:03:40Z

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On Sun, 2008-05-04 at 16:06 +0200, Johannes Berg wrote:
> > There are three ways out of this. You could have your own cache
> > (I haven't looked at your headers so I don't know whether that
> > makes sense), have no cache at all, or add a new field that gets
> > added to hard_header_len for the purposes of calculating head
> > room.
>
> I tried the last option, patch below, didn't quite work out yet, but I
> got:
>
> [ 256.241496] KERNEL: assertion (!atomic_read(&sk->sk_wmem_alloc))
> failed at net/packet/af_packet.c (225)

Except for that, the patch works fine with mac80211 setting the new
netdev fields. I still get lots of reallocations though because I get a
lot of cloned packets, not sure why.