netdev - Re: [PATCH net-next] net_sched: increment drop counters in qdisc_tree_decrease

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Message-Id: <20131008.165124.1061477322585989569.davem@davemloft.net>
Date:	Tue, 08 Oct 2013 16:51:24 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net_sched: increment drop counters in
 qdisc_tree_decrease_qlen()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 07 Oct 2013 08:32:32 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> qdisc_tree_decrease_qlen() is called when some packets are dropped
> on a qdisc, and we want to notify parents of qlen changes.
> 
> We also can increment parents qdisc qstats drop counters.
> 
> This permits more accurate drop counters up to root qdisc.
> 
> For example a graft operation typically resets a qdisc 
> (drops all packets) and call qdisc_tree_decrease_qlen()
> 
> Note that callers are responsible for their drop counters.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.
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