linux-kernel - Re: dyntick-hpc and RCU

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Message-ID: <20101105150648.GB2850@linux.vnet.ibm.com>
Date:	Fri, 5 Nov 2010 08:06:48 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	mathieu.desnoyers@...icios.com, dhowells@...hat.com,
	loic.minier@...aro.org, dhaval.giani@...il.com, tglx@...utronix.de,
	peterz@...radead.org, linux-kernel@...r.kernel.org,
	josh@...htriplett.org
Subject: Re: dyntick-hpc and RCU

On Fri, Nov 05, 2010 at 06:38:17AM +0100, Frederic Weisbecker wrote:
> 2010/11/5 Frederic Weisbecker <fweisbec@...il.com>:
> > For now #3 seems to me more viable (with one of the adds I proposed).
> 
> Doh, but I forgot it's not preemptable! So #2 looks then more viable.
> Unless we can tweak #3 into getting it preemptable.

There are ways of getting preemptiblity working.  This might not be
all that big a modification to TREE_PREEMPT_RCU, now that I think
of it.

							Thanx, Paul
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