Re: ICMP packets - ll_temac with Microblaze

[Eric Dumazet <eric.dumazet@xxxxxxxxx>]

Le mercredi 21 décembre 2011 à 11:41 +0100, Michal Simek a écrit :

> yes, page size is 4k.
> 
> Here is the log for allocation - origin size for MTU 9000 is 0x2420(9248) and size after
> overhead is 0x3f40(16192)
> 
> kmalloc_node_track_caller size 00002420, SKB_WITH_OVERHEAD(ksize(data)) 00003f40
> skb->head     c7870000
> skb->data     c7870000
> skb->tail     c7870000
> skb->truesize 000040c0
> skb->end      c7873f40
> 

So basically truesize is bigger than previous kernel, and you hit a
socket limit.  (RCVBUF ?)

truesize is more correct, so we uncover prior bugs.

We should allow at least one packet, regardless of its size :(



--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html