netdev - Re: [PATCH net-next 0/7] clear old options when old qdisc's replaced

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Date:	Fri, 14 Feb 2014 04:44:01 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yang Yingliang <yangyingliang@...wei.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	stephen@...workplumber.org
Subject: Re: [PATCH net-next 0/7] clear old options when old qdisc's replaced

On Fri, 2014-02-14 at 16:36 +0800, Yang Yingliang wrote:
> I've added a netem qdisc with rate option, then I replace this qdisc
> without rate option but with latency option. The rate option is still
> there.
> 
> E.g.
>   # tc qdisc add dev eth4 handle 1: root netem rate 10mbit
>   # tc qdisc show
>     qdisc netem 1: dev eth4 root refcnt 2 limit 1000 rate 10Mbit
> 
>   # tc qdisc replace dev eth4 handle 1: root netem latency 10ms
>   # tc qdisc show
>     qdisc netem 1: dev eth4 root refcnt 2 limit 1000 delay 10.0ms rate 10Mbit
> 
> The old options need be cleared after the qdisc is replaced.

Not at all. Test your changes with "tc qdisc change ... "



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