linux-kernel - Re: [PATCH] x86: fix idle notifier not being called in CONFIG_X86

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Date:	Mon, 25 Mar 2013 12:48:58 -0400
From:	Len Brown <lenb@...nel.org>
To:	"Mansoor, Illyas" <illyas.mansoor@...el.com>
CC:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux PM <linux-pm@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, X86 <x86@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Tejun Heo <tj@...nel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"Rudramuni, Vishwesh M" <vishwesh.m.rudramuni@...el.com>,
	"richard@....at" <richard@....at>,
	"josh@...htriplett.org" <josh@...htriplett.org>,
	"Kumar P, Mahesh" <mahesh.kumar.p@...el.com>,
	"Sil, Dyut K" <dyut.k.sil@...el.com>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH] x86: fix idle notifier not being called in CONFIG_X86_32

I'm okay with this patch since it makes 32-bit and 64-bit consistent,
and technically, it fixes a regression.

If/when we get rid of the notifier, we should do it for both 32-and
64-bit at the same time.

It isn't clear to me that Alex's work will solve this particular
problem, or that there is a code or logical conflict -- though
maybe you are referring to some code I've not read yet.

So for this trivial patch...
Acked-by: Len Brown <len.brown@...el.com>

But I think the bigger problem here is the expectation that out of tree
drivers will not break.  The interactive governor is not upstream.

Len Brown, Intel Open Source Technology Center

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