linux-kernel - Re: [PATCH] rcu: don't call rcu_preempt_note_context_switch() in rcu_check

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Message-ID: <20100402152507.GA2549@linux.vnet.ibm.com>
Date:	Fri, 2 Apr 2010 08:25:07 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rcu: don't call rcu_preempt_note_context_switch() in
 rcu_check_callbacks()

On Fri, Apr 02, 2010 at 08:27:15PM +0800, Lai Jiangshan wrote:
> Paul E. McKenney wrote:
> > On Thu, Apr 01, 2010 at 03:24:05PM +0800, Lai Jiangshan wrote:
> >> Paul E. McKenney wrote:
> >>> Possibly by moving the clearing of RCU_READ_UNLOCK_NEED_QS to
> >>> rcu_preempt_check_callbacks() 
> >> current rcu_preempt_check_callbacks() already has code to
> >> clear RCU_READ_UNLOCK_NEED_QS.
> > 
> > English is failing me. 
> > How about the following patch instead?  Untested,
> > probably does not even compile.
> 
> Very nice, thank you.
> 
> Acked-by: Lai Jiangshan <laijs@...fujitsu.com>

Thank you!  It passed overnight testing, so I have queued this for 2.6.35
with your Acked-by.

							Thanx, Paul
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