From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp07.au.ibm.com (e23smtp07.au.ibm.com [202.81.31.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp07.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 7A792B70B3 for ; Tue, 22 Sep 2009 21:25:41 +1000 (EST) Received: from d23relay01.au.ibm.com (d23relay01.au.ibm.com [202.81.31.243]) by e23smtp07.au.ibm.com (8.14.3/8.13.1) with ESMTP id n8MBPd5p006774 for ; Tue, 22 Sep 2009 21:25:39 +1000 Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay01.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n8MBPdss409818 for ; Tue, 22 Sep 2009 21:25:39 +1000 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n8MBPbET019980 for ; Tue, 22 Sep 2009 21:25:39 +1000 Date: Tue, 22 Sep 2009 16:55:27 +0530 From: Arun R Bharadwaj To: Peter Zijlstra , Joel Schopp , Benjamin Herrenschmidt , Paul Mackerras , Ingo Molnar , Vaidyanathan Srinivasan , Dipankar Sarma , Balbir Singh , Gautham R Shenoy , Shaohua Li , Venkatesh Pallipadi , Arun Bharadwaj Subject: [v6 PATCH 0/7]: cpuidle/x86/POWER: Cleanup idle power management code in x86, cleanup drivers/cpuidle/cpuidle.c and introduce cpuidle to POWER. Message-ID: <20090922112526.GA7788@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Reply-To: arun@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, This patchset introduces cpuidle infrastructure to POWER, prototyping for pSeries, and also does a major refactoring of current x86 idle power management and a cleanup of cpuidle infrastructure. My earlier iterations can be found at: v5 --> http://lkml.org/lkml/2009/9/22/26 v4 --> http://lkml.org/lkml/2009/9/1/133 v3 --> http://lkml.org/lkml/2009/8/27/124 v2 --> http://lkml.org/lkml/2009/8/26/233 v1 --> http://lkml.org/lkml/2009/8/19/150 Changes in this version: ------------------------------------------ Remove the bug from previous iteration in the routine cpuidle_remove_from_list(), which was causing the kernel to panic on platform supporting multiple sleep states. Add the routine cpuidle_kick_cpus() in POWER, which is needed to kick the cpus out of their idle when changing the idle routines. TODO: ------------------------------------------- Peterz suggested it would be nice to have a sysfs interface through which an idle routine can be forced at runtime. Also, current implementation registers every cpu as a cpuidle_device, but this is an overkill and the registering mechanism should be a systemwide process and not per-cpu. (probably one of the original cpuidle authors can reply to this - Venki, Shaohua Li? ). ppc_md.power_save has been replaced by cpuidle_idle_call only for pseries. So this needs to be done for all POWER platforms so that ppc_md.power_save is completely removed. Any comments on the design is welcome. --arun