From mboxrd@z Thu Jan 1 00:00:00 1970 From: Deepthi Dharwar Subject: Re: acpi_idle and max_cpus Date: Mon, 18 Jun 2012 17:55:30 +0530 Message-ID: <4FDF1E3A.6010200@linux.vnet.ibm.com> References: <4FDB549F.1020002@linaro.org> <4FDE3B96.8030306@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4FDE3B96.8030306@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Daniel Lezcano Cc: linux-acpi@vger.kernel.org, linux-pm@lists.linux-foundation.org List-Id: linux-acpi@vger.kernel.org Hi Daniel, On 06/18/2012 01:48 AM, Daniel Lezcano wrote: > On 06/15/2012 05:28 PM, Daniel Lezcano wrote: >> >> Hi all, >> >> I have a dual core Intel T9500. >> >> I boot the cpu with the acpi_idle driver and intel_idle enabled in the >> config. >> >> The kernel is booted with maxcpus=1. >> >> After the system has boot, I put cpu1 online via sysfs. >> >> But I don't see any 'cpuidle' directory in the cpu's sysfs entry: >> >> /sys/devices/system/cpu/cpu1/cpuidle (?) >> >> When I look at the code I see the notifier is present for hotplug in >> processor_driver.c and the cpuidle intel init routine should be called >> there. >> Yes, we have a hotplug notifier. Commit 99b72508 by Thomas Renninger fixed this issue. Please let me know which kernel version you are running and what is idle driver registered ? >> I am wondering is it a bug or an expected behavior ? > > Any thoughts on that ? > > Thanks > -- Daniel > > Cheers Deepthi