From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balbir Singh Subject: Re: [RFC/PATCH 1/2] cpuidle: Allow idle-states to be disabled at start Date: Thu, 25 Aug 2016 00:48:38 +1000 Message-ID: References: <48afad7788300482c047fc35e70ca8e4bf31a5ac.1471557381.git.ego@linux.vnet.ibm.com> <57BDB2D8.4080507@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <57BDB2D8.4080507@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" To: Daniel Lezcano , "Gautham R. Shenoy" , "Rafael J. Wysocki" , Michael Ellerman , Benjamin Herrenschmidt , Michael Neuling , Paul Mackerras , Vaidyanathan Srinivasan Cc: linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Anton Blanchard List-Id: linux-pm@vger.kernel.org On 25/08/16 00:44, Daniel Lezcano wrote: > On 08/19/2016 12:26 AM, Gautham R. Shenoy wrote: >> From: "Gautham R. Shenoy" >> >> 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