linux-kernel - Re: [RFC PATCH] sched: lockdep circular locking error (rcu_node_level

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Date:	Thu, 21 Jul 2011 20:39:40 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Cheng Xu <chengxu@...ux.vnet.ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Paul Mckenney <paulmck@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH] sched: lockdep circular locking error
 (rcu_node_level_0 vs rq->lock)

On Fri, 2011-07-22 at 02:35 +0800, Cheng Xu wrote:
> This is an updated version of Peter Zijlstra's patch at
> https://lkml.org/lkml/2011/7/12/344 that successfully boots on IBM JS22
> Blade (with two Power6 quad-core CPUs). It might not be needed, but I am
> posting it just in case.

right, but if at all possible, I'd like to avoid actually doing this
since it adds more code to fairly hot paths. Furthermore it looks like
we sorted all issues in different ways.

But thanks!
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