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

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Date:	Thu, 15 Jan 2009 13:28:31 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
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, 13 Jan 2009, Paul E. McKenney 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>

Thanks.

> > > 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.

It doesn't seem to be present in today's -next, so I have queued up in 
trivial tree.

thanks,

-- 
Jiri Kosina
SUSE Labs
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