linux-kernel - Re: [v8 PATCH 2/8]: cpuidle: implement a list based approach to register a set of idle routines.

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Message-ID: <20091014071838.GE23248@one.firstfloor.org>
Date:	Wed, 14 Oct 2009 09:18:38 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Arun R Bharadwaj <arun@...ux.vnet.ibm.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Ingo Molnar <mingo@...e.hu>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Balbir Singh <balbir@...ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-arch@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [v8 PATCH 2/8]: cpuidle: implement a list based approach to register a set of idle routines.

> How about something like this..
> If the arch does not enable CONFIG_CPU_IDLE, the cpuidle_idle_call
> which is called from cpu_idle() should call default_idle without
> involving the registering cpuidle steps. This should prevent bloating
> up of the kernel for archs which dont want to use cpuidle.

On x86 some people want small kernel too, so selecting it on a architecture
granuality is not good. Also you can make it default, you just need
to slim it down first.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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