netdev - Re: ICMP packets - ll_temac with Microblaze

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Message-ID: <1324560068.2153.6.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Thu, 22 Dec 2011 14:21:08 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Michael Wang <wangyun@...ux.vnet.ibm.com>
Cc:	monstr@...str.eu, David Miller <davem@...emloft.net>,
	John Williams <john.williams@...alogix.com>,
	netdev@...r.kernel.org
Subject: Re: ICMP packets - ll_temac with Microblaze

Le jeudi 22 décembre 2011 à 21:01 +0800, Michael Wang a écrit :

> Hi, Eric
> 
> So do you mean the way is:
> 
> ip_local_deliver_finish --> raw_local_deliver --> raw_v4_input -->
> raw_rcv --> raw_rcv_skb --> sock_queue_rcv_skb
> 
> And in sock_queue_rcv_skb:
> 
>         if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
>             (unsigned)sk->sk_rcvbuf) {
>                 atomic_inc(&sk->sk_drops);
>                 trace_sock_rcvqueue_full(sk, skb);
>                 return -ENOMEM;				//drop?
>         }
> 
> Is this the way the packet being dropped? Is this confirmed by some printk?
> 
> Sorry if the question is naive, I just want to make sure I am checking
> at the right place.
> 

Yep

Are you aware I already posted a patch to solve the problem ?

http://patchwork.ozlabs.org/patch/132698/



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