linux-kernel - Re: [PATCH for 2.6.25] Markers

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Message-ID: <20080401204542.GA8558@linux.vnet.ibm.com>
Date:	Tue, 1 Apr 2008 13:45:42 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH for 2.6.25] Markers - use synchronize_sched()

On Tue, Apr 01, 2008 at 01:30:17PM -0700, Andrew Morton wrote:
> On Mon, 31 Mar 2008 09:16:09 -0400
> Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> wrote:
> 
> > Use synchronize_sched before calling call_rcu in CONFIG_PREEMPT_RCU until we
> > have call_rcu_sched and rcu_barrier_sched in mainline. It will slow down the
> > marker operations in CONFIG_PREEMPT_RCU, but it fixes the current race against
> > the preempt_disable/enable() protected code paths.
> 
> A better changelog would have described the bug which is being fixed.
> 
> > Paul, is this ok ? It would be good to get this in for 2.6.25 final.
> 
> Paul seems to have nodded off.  I'll merge it.

Paul seems to have fat-fingered the earlier message.  But he does see the
message adding this to -mm, and the patch looks good to me.

							Thanx, Paul
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