linux-kernel - workqueue destruction BUG

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Message-ID: <1282640156.3695.5.camel@jlt3.sipsolutions.net>
Date:	Tue, 24 Aug 2010 10:55:56 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Tejun Heo <tj@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: workqueue destruction BUG_ON

Tejun, all,

In our testing with iwlwifi, we keep running into this BUG_ON:

	BUG_ON(cwq->nr_active);

in destroy_workqueue(). This is quite unhelpful, and since the code
flushes the workqueue I really don't see how this could be happening,
unless maybe there's cross-talk between this and other workqueues?

johannes

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