linux-kernel - Re: Warning in worker_enter

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Message-ID: <20120507213449.GM19417@google.com>
Date:	Mon, 7 May 2012 14:34:49 -0700
From:	Tejun Heo <tj@...nel.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Warning in worker_enter_idle()

Hello,

On Mon, May 07, 2012 at 01:55:16PM -0700, Paul E. McKenney wrote:
> I was running rcutorture with CPU hotplug operations.  It has happened
> a couple of times on the .config that I attached, but never under any
> of the other 13 .configs that I run.

Ah, okay.  The invariant breaks when CPU detaches.  The WARN_ON()
probably just needs a condition to disable it if the gcwq is detached.
I'll look into it tomorrow.

Thanks.

-- 
tejun
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