linux-kernel - Re: [PATCH 2/5] sched: idle: Get the next timer event and pass it the cpuidle framework

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Date:	Tue, 28 Oct 2014 12:10:06 +0530
From:	Preeti Murthy <preeti.lkml@...il.com>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/5] sched: idle: Get the next timer event and pass it the
 cpuidle framework

Hi Daniel,

On Mon, Oct 20, 2014 at 9:55 PM, Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
> Following the logic of the previous patch, retrieve from the idle task the
> expected timer sleep duration and pass it to the cpuidle framework.
>
> Take the opportunity to remove the unused headers in the menu.c file.
>
> This patch does not change the current behavior.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
>  drivers/cpuidle/cpuidle.c          | 11 +++++------
>  drivers/cpuidle/governors/ladder.c |  3 ++-
>  drivers/cpuidle/governors/menu.c   |  8 ++------
>  include/linux/cpuidle.h            |  8 +++++---
>  kernel/sched/idle.c                | 16 ++++++++++++----
>  5 files changed, 26 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> index 372c36f..64f5800 100644
> --- a/drivers/cpuidle/cpuidle.c
> +++ b/drivers/cpuidle/cpuidle.c
> @@ -8,16 +8,12 @@
>   * This code is licenced under the GPL.
>   */
>
> -#include <linux/clockchips.h>
>  #include <linux/kernel.h>
>  #include <linux/mutex.h>
> -#include <linux/sched.h>
>  #include <linux/notifier.h>
>  #include <linux/pm_qos.h>
>  #include <linux/cpu.h>
>  #include <linux/cpuidle.h>
> -#include <linux/ktime.h>
> -#include <linux/hrtimer.h>
>  #include <linux/module.h>
>  #include <trace/events/power.h>
>
> @@ -155,11 +151,13 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
>   *
>   * @drv: the cpuidle driver
>   * @dev: the cpuidle device
> + * @latency_req: the latency constraint when choosing an idle state

You might want to include this change in the previous patch itself.

> + * @next_timer_event: the duration until the timer expires
>   *
>   * Returns the index of the idle state.
>   */

Regards
Preeti U Murthy
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