linux-kernel - Re: [RFC] dynticks: dynticks_idle is only modified locally use this

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Message-ID: <alpine.DEB.2.11.1409021545370.32690@gentwo.org>
Date:	Tue, 2 Sep 2014 15:47:55 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] dynticks: dynticks_idle is only modified locally use
 this_cpu ops

On Tue, 2 Sep 2014, Paul E. McKenney wrote:

> But yes, in theory, something like this can work if appropriate memory
> barriers are put in place.  In practice, this sort of change needs
> profound testing on multiple architectures.

Ok how can we move forward? I just looked further and it seems a similar
approach could perhaps work for the dynticks field.

If the first patch I send gets merged then a lot of other this_cpu related
optimizations become possible regardless of the ones in the RFC.


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