netdev - Re: [PATCH] team: set qdisc_tx_busylock to avoid LOCKDEP splat

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Message-Id: <20121004.155436.2187376781654738552.davem@davemloft.net>
Date:	Thu, 04 Oct 2012 15:54:36 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, jpirko@...hat.com
Subject: Re: [PATCH] team: set qdisc_tx_busylock to avoid LOCKDEP splat

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 04 Oct 2012 11:18:39 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> If a qdisc is installed on a team device, its possible to get
> a lockdep splat under stress, because nested dev_queue_xmit() can
> lock busylock a second time (on a different device, so its a false
> positive)
> 
> Avoid this problem using a distinct lock_class_key for team
> devices.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Jiri Pirko <jpirko@...hat.com>

Applied.
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