From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Date: Sun, 4 May 2008 11:16:52 +0800 > On Sun, May 04, 2008 at 04:22:20AM +0200, Johannes Berg wrote: > > > > Yes, wireless always needs at least 24 bytes, but more likely 34 > > (encryption+QoS). However, I just increased LL_MAX_HEADER to 54 and that > > doesn't seem to have helped. > > How did you test it? I know what causes this problem, things like ARP. They don't use LL_MAX_HEADER, and instead go: skb = alloc_skb(arp_hdr_len(dev) + LL_RESERVED_SPACE(dev), GFP_ATOMIC); because they are reasonably sure what exact device they are sending out of :-) As mentioned elsewhere, there is a disconnect between how some of these values are used. But I'm pretty sure I know why some of them are used this way. -- 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
