From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH RFC] net: Fix race condition when removing qdisc
Date: Thu, 03 Mar 2016 15:52:48 -0800
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Cc: Cong Wang <xiyou.wangcong@gmail.com>,
	Linux Kernel Network Developers <netdev@vger.kernel.org>,
	Lawrence Brakmo <brakmo@fb.com>,
	Kernel Team <kernel-team@fb.com>
To: Tom Herbert <tom@herbertland.com>
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On jeu., 2016-03-03 at 14:24 -0800, Tom Herbert wrote:
> This a kernel based on 3.10. We believe the lockups coincide with
> removing/readding qdiscs.

You could backport 64153ce0a7b61b2a
("net_sched: htb: do not setup default rate estimators"),
unless you desperately want these rate estimators...

How many HTB classes do you deal with ?