From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH net-next] tcp: add SNMP counter for the number of packets
 pruned from ofo queue
Date: Wed, 25 Jul 2018 06:55:20 -0700
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Cc: David Miller <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
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To: Yafang Shao <laoar.shao@gmail.com>,
        Eric Dumazet <eric.dumazet@gmail.com>
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On 07/25/2018 06:40 AM, Yafang Shao wrote:

> 
> Because we want to know why packets were dropped.
> If that could be show in netstat, we could easily find that it is
> dropped due to ofo prune.


We have a counter already for these events : LINUX_MIB_OFOPRUNED

You want to add another counter tracking number of _skbs_,
which has no precise value for user,
given each skb can contain a variable number of _packets_.