From: Ingo Molnar <mingo@elte.hu>
To: Sam Ravnborg <sam@ravnborg.org>
Cc: paulmck@linux.vnet.ibm.com, 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: Fri, 26 Dec 2008 15:22:36 +0100 [thread overview]
Message-ID: <20081226142236.GA24249@elte.hu> (raw)
In-Reply-To: <20081225093301.GB27896@uranus.ravnborg.org>
* Sam Ravnborg <sam@ravnborg.org> wrote:
> On Thu, Dec 25, 2008 at 09:36:11AM +0100, Ingo Molnar wrote:
> >
> > below is the fix for another small buglet that hits architectures that do
> > not include kernel/Kconfig.preempt.
>
> What is needed to let all architectures include Kconfig.preempt?
> We should not advertise preemption if not supported,
> but we could do this by a simple Kconfig symbol:
>
> config HAVE_PREEMPT
> bool
>
> And let all architectures that supports preemption do:
>
> config "ARCH"
> select HAVE_PREEMPT
>
> But maybe there is a simpler solution
Since a preemptive kernel is not supported by all architectures, there has
to be per arch ways to express this - i.e. i think your solution is the
cleanest.
Ingo
next prev parent reply other threads:[~2008-12-26 14:24 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
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 [this message]
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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