From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755165AbaEILKL (ORCPT ); Fri, 9 May 2014 07:10:11 -0400 Received: from v094114.home.net.pl ([79.96.170.134]:56117 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752724AbaEILKJ (ORCPT ); Fri, 9 May 2014 07:10:09 -0400 From: "Rafael J. Wysocki" To: Pavel Machek Cc: Linux PM list , Linux Kernel Mailing List , Daniel Lezcano , Zhang Rui , Aubrey Li Subject: Re: [PATCH] PM / suspend: Always use deepest C-state in the "freeze" sleep state Date: Fri, 09 May 2014 13:26:47 +0200 Message-ID: <2485687.UrJORvS9e7@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.14.0-rc7+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <20140509073835.GB4965@xo-6d-61-c0.localdomain> References: <2548502.zJ1no3NhRc@vostro.rjw.lan> <20140509073835.GB4965@xo-6d-61-c0.localdomain> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday, May 09, 2014 09:38:35 AM Pavel Machek wrote: > On Mon 2014-05-05 00:51:54, Rafael J. Wysocki wrote: > > From: Rafael J. Wysocki > > > > If freeze_enter() is called, we want to bypass the current cpuidle > > governor and always use the deepest available (that is, not disabled) > > C-state, because we want to save as much energy as reasonably possible > > then and runtime latency constraints don't matter at that point, since > > the system is in a sleep state anyway. > > Would there be way to pass the parameter "go to deepest" instead of adding > global state for this? I'm not sure what you mean? A parameter of what in particular? And where to pass it? Rafael