From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755534AbcIZXyE (ORCPT ); Mon, 26 Sep 2016 19:54:04 -0400 Received: from mail-oi0-f48.google.com ([209.85.218.48]:33289 "EHLO mail-oi0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751497AbcIZXxz (ORCPT ); Mon, 26 Sep 2016 19:53:55 -0400 Subject: Re: Regression in 4.8 - CPU speed set very low To: "Rafael J. Wysocki" References: <3919370.SGLjGupePs@vostro.rjw.lan> <075788ab-34e0-803c-f2b4-3f370ecc6b14@lwfinger.net> <2477506.olat0BX4ex@vostro.rjw.lan> <1436996d-078b-aa51-4452-b6655d917135@lwfinger.net> <594f5012-5157-bfdd-f715-bea8caa824c3@lwfinger.net> Cc: "Rafael J. Wysocki" , LKML , Linux PM list , Srinivas Pandruvada From: Larry Finger Message-ID: Date: Mon, 26 Sep 2016 18:53:53 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/26/2016 05:16 PM, Rafael J. Wysocki wrote: >On Tue, Sep 27, 2016 at 12:09 AM, Larry Finger wrote: > > Maybe it's better to try diagnose the problem instead of spending more > time on bisection. In my original post, I asked for such help, but nothing until today. I had no idea what to check, but now I have a better idea. > I'd like to know whether or not 4.7 was definitely good, though. I never saw this problem with 4.7, but given the difficulty in triggering the problem, my tests may not have been definitive. > >> If it is one of them, it may be a while before I dare call this one "good". >> In one respect, that is good as I will be traveling tomorrow and Wednesday. > > What does "cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver" say? intel_pstate Larry