linux-kernel - Re: [PATCH] Remove a duplicated option of RCU_CPU_STALL

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Message-ID: <20090113233450.GD6756@linux.vnet.ibm.com>
Date:	Tue, 13 Jan 2009 15:34:50 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Kaibin Li <kaibinlee@...il.com>, trivial@...nel.org,
	Dipankar Sarma <dipankar@...ibm.com>,
	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: [PATCH] Remove a duplicated option of RCU_CPU_STALL_DETECTOR

On Tue, Jan 13, 2009 at 11:48:44PM +0100, Jiri Kosina wrote:
> On Tue, 13 Jan 2009, Kaibin Li wrote:
> 
> > There is a duplicated option of "Check for stalled CPUs delaying RCU
> > grace periods" in Kernel hacking.

Reviewed-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

> > Signed-off-by: Kaibin Li <kaibinlee@...il.com>
> > ---
> >  lib/Kconfig.debug |   13 -------------
> >  1 files changed, 0 insertions(+), 13 deletions(-)
> > 
> > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> > index 4c9ae60..e770e85 100644
> > --- a/lib/Kconfig.debug
> > +++ b/lib/Kconfig.debug
> > @@ -633,19 +633,6 @@ config RCU_TORTURE_TEST_RUNNABLE
> >  
> >  config RCU_CPU_STALL_DETECTOR
> >     bool "Check for stalled CPUs delaying RCU grace periods"
> > -   depends on CLASSIC_RCU
> > -   default n
> > -   help
> > -     This option causes RCU to printk information on which
> > -     CPUs are delaying the current grace period, but only when
> > -     the grace period extends for excessive time periods.
> > -
> > -     Say Y if you want RCU to perform such checks.
> > -
> > -     Say N if you are unsure.
> > -
> > -config RCU_CPU_STALL_DETECTOR
> > -   bool "Check for stalled CPUs delaying RCU grace periods"
> >     depends on CLASSIC_RCU || TREE_RCU
> >     default n
> >     help
> 
> The RCU_CPU_STALL_DETECTOR indeed is duplicate, but the entries themselves 
> are not identical, as they have different dependencies.
> 
> Paul -- does Kaibin's patch remove the correct one? If so, I can take it 
> through trivial tree.

Indeed it is:  http://lkml.org/lkml/2008/12/23/167  ;-)

CCing Ingo in case he has it queued up.

							Thanx, Paul
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