linux-kernel - Re: [RFC/PATCH 1/2] cpuidle: Allow idle-states to be disabled at start

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Date:   Thu, 25 Aug 2016 00:48:38 +1000
From:   Balbir Singh <bsingharora@...il.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Neuling <michael.neuling@....ibm.com>,
        Paul Mackerras <paulus@...ba.org>,
        Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Anton Blanchard <anton@...ba.org>, linux-pm@...r.kernel.org
Subject: Re: [RFC/PATCH 1/2] cpuidle: Allow idle-states to be disabled at
 start



On 25/08/16 00:44, Daniel Lezcano wrote:
> On 08/19/2016 12:26 AM, Gautham R. Shenoy wrote:
>> From: "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
>>
>> Currently all the idle states registered by a cpu-idle driver are
>> enabled by default. This patch adds a mechanism which allows the
>> driver to hint if an idle-state should start in a disabled state. The
>> cpu-idle core will use this hint to appropriately initialize the
>> usage->disable knob of the CPU device idle state.
> 
> Why do you need to do that ?
> 

I think patch 2/2 explains the reason as it uses this infrastructure

Balbir Singh