linux-kernel - Re: [PATCH tip/core/rcu 14/24] rcu: Directly drive TASKS

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Message-ID: <20150513171406.GG6776@linux.vnet.ibm.com>
Date:	Wed, 13 May 2015 10:14:06 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH tip/core/rcu 14/24] rcu: Directly drive TASKS_RCU from
 Kconfig

On Wed, May 13, 2015 at 09:31:19AM -0400, Steven Rostedt wrote:
> On Tue, 12 May 2015 15:30:44 -0700
> "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
> > 
> > Currently, Kconfig will ask the user whether TASKS_RCU should be set.
> > This is silly because Kconfig already has all the information that it
> > needs to set this parameter.  This commit therefore directly drives
> > the value of TASKS_RCU via "select" statements.  Which means that
> > as subsystems require TASKS_RCU, those subsystems will need to add
> > "select" statements of their own.
> > 
> > Reported-by: Ingo Molnar <mingo@...nel.org>
> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> > Cc: Steven Rostedt <rostedt@...dmis.org>
> 
> Which reminds me. I need to write the code to implement the usage of
> this :-)

Indeed, before the unused-feature mafia forces me to remove it.  ;-)

							Thanx, Paul

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