From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
akpm@linux-foundation.org, ralf@linux-mips.org,
kernel@wantstofly.org, hskinnemoen@atmel.com,
cooloney@kernel.org, tony.luck@intel.com, geert@linux-m68k.org,
zippel@linux-m68k.org, jwboyer@linux.vnet.ibm.com,
mporter@kernel.crashing.org, grant.likely@secretlab.ca,
paulus@samba.org, benh@kernel.crashing.org, dhowells@redhat.com,
yasutake.koichi@jp.panasonic.com, lethal@linux-sh.org,
hpa@zytor.com
Subject: Re: [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU.
Date: Tue, 23 Dec 2008 13:59:48 -0800 [thread overview]
Message-ID: <20081223215948.GA16137@linux.vnet.ibm.com> (raw)
In-Reply-To: <20081223142542.GC29151@elte.hu>
On Tue, Dec 23, 2008 at 03:25:42PM +0100, Ingo Molnar wrote:
>
> * paulmck@linux.vnet.ibm.com <paulmck@linux.vnet.ibm.com> wrote:
>
> > From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> >
> > Only for testing in -tip and -next, not yet for inclusion into mainline.
> >
> > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> > ---
> > arch/arm/configs/afeb9260_defconfig | 2 +-
> > arch/arm/configs/am200epdkit_defconfig | 2 +-
> > arch/arm/configs/cm_x300_defconfig | 2 +-
> > arch/arm/configs/corgi_defconfig | 2 +-
> > arch/arm/configs/csb637_defconfig | 2 +-
> > arch/arm/configs/eseries_pxa_defconfig | 2 +-
> > arch/arm/configs/ezx_defconfig | 2 +-
> > arch/arm/configs/imx27ads_defconfig | 2 +-
> > arch/arm/configs/jornada720_defconfig | 2 +-
> > arch/arm/configs/kirkwood_defconfig | 2 +-
> > arch/arm/configs/loki_defconfig | 2 +-
> > arch/arm/configs/magician_defconfig | 2 +-
> > arch/arm/configs/mv78xx0_defconfig | 2 +-
> > arch/arm/configs/mx31ads_defconfig | 2 +-
> > arch/arm/configs/mx31litekit_defconfig | 2 +-
> > arch/arm/configs/omap3_beagle_defconfig | 2 +-
> > arch/arm/configs/omap_h2_1610_defconfig | 2 +-
> > arch/arm/configs/omap_ldp_defconfig | 2 +-
> > arch/arm/configs/orion5x_defconfig | 2 +-
> > arch/arm/configs/overo_defconfig | 2 +-
> > arch/arm/configs/palmz72_defconfig | 2 +-
> > arch/arm/configs/pcm037_defconfig | 2 +-
> > arch/arm/configs/pcm038_defconfig | 2 +-
> > arch/arm/configs/s3c2410_defconfig | 2 +-
> > arch/arm/configs/spitz_defconfig | 2 +-
> > arch/arm/configs/tct_hammer_defconfig | 2 +-
> > arch/arm/configs/viper_defconfig | 2 +-
> > arch/arm/configs/xm_x2xx_defconfig | 2 +-
> > 28 files changed, 28 insertions(+), 28 deletions(-)
>
> ouch!
>
> There's a much more shrewd method to achieve the same, via 2 lines total
> patch:
>
> Change the name of CONFIG_CLASSIC_RCU to something else such as
> CONFIG_FLAT_RCU. That does all the magic and more: all configs will
> default to tree-rcu - not just defconfigs! Agreed?
Good point!
> [ I think the gene of laziness is probably more developed in my genome
> than in yours. It is a very useful trait ;-) ]
Lazy or not, your approach is much better than what I was doing. ;-)
Two patches in subsequent emails: the first gets rid of a duplicate
RCU_CPU_STALL_DETECTOR config declaration (noticed in this exercise --
one each from the CLASSIC_RCU and TREE_RCU stall detectors), and the
second changes the default to TREE_RCU as you suggest.
Thanx, Paul
next prev parent reply other threads:[~2008-12-23 21:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-23 0:12 [PATCH -tip] Change default from CLASSIC_RCU to TREE_RCU (testing only) paulmck
2008-12-23 0:12 ` [PATCH -tip] Set the default RCU to be rcutree paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU paulmck
2008-12-23 14:25 ` Ingo Molnar
2008-12-23 21:59 ` Paul E. McKenney [this message]
2008-12-23 22:03 ` [PATCH, -tip] Remove redundant RCU_CPU_STALL_DETECTOR declaration Paul E. McKenney
2008-12-23 22:06 ` [PATCH, -tip] Make hierarchical RCU be the default Paul E. McKenney
2008-12-27 10:35 ` Ingo Molnar
2008-12-27 23:27 ` Paul E. McKenney
2008-12-27 23:39 ` Paul E. McKenney
2008-12-29 3:22 ` [PATCH, -tip] v2 " Paul E. McKenney
2008-12-25 8:36 ` [PATCH -tip] Switch arm defconfig files from CONFIG_CLASSIC_RCU to CONFIG_TREE_RCU Ingo Molnar
2008-12-25 9:33 ` Sam Ravnborg
2008-12-25 19:23 ` Paul E. McKenney
2008-12-26 18:35 ` Sam Ravnborg
2008-12-26 14:22 ` Ingo Molnar
2008-12-25 18:46 ` Paul E. McKenney
2008-12-23 0:12 ` [PATCH -tip] Switch avr32 defconfigs " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch blackfin defconfig " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch ia64 " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch m68k " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch m68knommu " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch mips defconfig " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch mn10300 " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch powerpc " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch sh " paulmck
2008-12-23 0:12 ` [PATCH -tip] Switch x86 " paulmck
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