netdev - Re: [PATCH net-next-2.6 0/4] tunnels: SMP safe accounting

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Message-Id: <20100927.215127.115942543.davem@davemloft.net>
Date:	Mon, 27 Sep 2010 21:51:27 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6 0/4] tunnels: SMP safe accounting

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 27 Sep 2010 12:32:48 +0200

> Before making ip_gre, ipip, and sit transmit path lockless, it is
> necessary to make accounting SMP safe, not only for correctness but to
> avoid cache line ping pongs.
> 
> This also takes care of receive path, already lockless and using unsafe
> stats accounting.
> 
> I chose to use small percpu structures, holding {rx|tx}_{packets|bytes}
> only, and keep all other counters in netdev->stats, since they should be
> seldom used.

Series applied, thanks a lot Eric!
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