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

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Message-ID: <810586B7581CC8469141DADEBC37191224F77316@BGSMSX102.gar.corp.intel.com>
Date:	Wed, 6 Mar 2013 10:20:33 +0000
From:	"Mansoor, Illyas" <illyas.mansoor@...el.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	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>,
	Len Brown <lenb@...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>
Subject: RE: [PATCH] x86: fix idle notifier not being called in CONFIG_X86_32

> * Illyas Mansoor <illyas.mansoor@...el.com> wrote:
> 
> > Idle notifier not registered if CONFIG_X86_32 is defined, those
> > callbacks are empty for X86_32 platform.
> >
> > ifdef CONFIG_X86_64
> >  void enter_idle(void);
> >  void exit_idle(void);
> > else
> > static inline void enter_idle(void) { } static inline void
> > exit_idle(void) { } static inline void __exit_idle(void) { } endif
> >
> > Make this work on X86_32 platforms by
> > removing the restriction for X86_64
> 
> What will they be used for?

It's being used by interactive governor, and since the idle notifications are
not received
It breaks the governor functionality on X86_32 

Thanks,
-Illyas

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