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Date:	Thu, 24 Jun 2010 21:52:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	herbert@...dor.hengli.com.au, mst@...hat.com, frzhang@...hat.com,
	netdev@...r.kernel.org, amwang@...hat.com, shemminger@...tta.com,
	mpm@...enic.com, paulmck@...ux.vnet.ibm.com,
	a.p.zijlstra@...llo.nl, mingo@...e.hu
Subject: Re: [PATCH 6/8] netpoll: Allow netpoll_setup/cleanup recursion

From: Andrew Morton <akpm@...ux-foundation.org>
Date: Thu, 24 Jun 2010 21:42:04 -0700

> I'd imagine that netconsole would get in the way rather a lot for net
> developers, but it's really useful!

I have a fully logging stable serial or hypervisor console on every
one of my boxes, why would I even bother?

> That being said, I wonder why Herbert didn't hit this in his testing. 
> I suspect that he'd enabled lockdep, which hid the bug.  I haven't
> worked out _why_ lockdep hides the double-mutex_unlock bug, but it's a
> pretty bad thing to do.

Yes, definitely something to look into.
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