netdev - Re: [PATCH v2] netdev:bfin_mac: reclaim and free tx skb as soon as possible after transfer

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Message-ID: <AANLkTik-1cjIr6urrQg5RuyAVa_pf_GJS3UJ3JcfvQMb@mail.gmail.com>
Date:	Thu, 3 Jun 2010 18:54:40 +0800
From:	Junchang Wang <junchangwang@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v2] netdev:bfin_mac: reclaim and free tx skb as soon as 
	possible after transfer

>
> As I said, core network takes care of three counters only, because it
> was 'free', as they share a cache line with a spinlock we must hold when
> calling xmit function.
>
> In receive path, we dont dirty a cache line in core network, so updating
> counters would add a cost. (modern NICs handle stats in firmware)
>
That's really resolve my doubts about lack of RX stats in kernel stack.

Thanks Eric.

-- 
--Junchang
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