linux-kernel - Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based on semi-formal proof"

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Message-ID: <20110526202653.GB2765@elte.hu>
Date:	Thu, 26 May 2011 22:26:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Yinghai Lu <yinghai@...nel.org>, linux-kernel@...r.kernel.org,
	mingo@...hat.com, hpa@...or.com, tglx@...utronix.de
Subject: Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based
 on semi-formal proof"


* Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> > > this should also solve load average artifacts - do not 
> > > TASK_UNINTERRUPTIBLE tasks skew the load upwards?
> > 
> > Quite possibly -- in this case the artifacts would appear just 
> > after boot, and would disappear as soon as the RCU kthreads had 
> > something to do.
> 
> By the way, how would you like to proceed with the fixes thus far? 
> I have put them on -rcu for -next testing, FWIW.

I'd suggest to push them to me ASAP, they should get to Linus before 
-rc1.

Thanks,

	Ingo
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