From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Artem S. Tashkinov" Subject: CONFIG_X86_INTEL_PSTATE disables CPU frequency transition stats, many governors and other standard features Date: Sat, 27 Apr 2013 04:58:53 +0000 (UTC) Message-ID: <475427035.74642.1367038733183.JavaMail.mail@webmail08> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Sender: cpufreq-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: dirk.j.brandewie@intel.com, rjw@sisk.pl, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org List-Id: linux-pm@vger.kernel.org Hello, Just wanted to let everyone know that CONFIG_X86_INTEL_PSTATE wreaks havoc with the CPU frequency subsystem in the Linux kernel. With this option enabled: 1) All governors except performance and powersave are gone, ondemand userspace, conservative 2) scaling_cur_freq is gone, thus user space utilities monitoring the CPU frequency have stopped working 3) CPU frequency transition stats are gone, there's no "stats" directory anywhere 4) scaling_available_frequencies is gone, so I cannot set the desired constant CPU frequency (the userspace governor is not available anyway) Is this an intended behavior? I shrivel to think that's the case. The bug report is filed here: https://bugzilla.kernel.org/show_bug.cgi?id=57141 Best regards, Artem