From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFA53C433E2 for ; Sat, 29 Aug 2020 18:07:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D54E020838 for ; Sat, 29 Aug 2020 18:07:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728333AbgH2SHn convert rfc822-to-8bit (ORCPT ); Sat, 29 Aug 2020 14:07:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:58488 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728265AbgH2SHm (ORCPT ); Sat, 29 Aug 2020 14:07:42 -0400 From: bugzilla-daemon@bugzilla.kernel.org To: linux-pm@vger.kernel.org Subject: [Bug 209069] CPU stuck at 800 MHz at any load Date: Sat, 29 Aug 2020 18:07:42 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Power Management X-Bugzilla-Component: cpufreq X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tg@gmplib.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: linux-pm@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=209069 --- Comment #7 from Torbjörn Granlund (tg@gmplib.org) --- bugzilla-daemon@bugzilla.kernel.org writes: intel_cpufreq CPU frequency driver (intel_pstate in passive mode), userspace governor with a setspeed of 0.8GHz. So, you are getting what you asked for. I will gladly confess my ignorance about this. But...I've maintained these systems for a long time, and gradually upgraded the kernels (as well as the user space). The CPU_FREQ_GOV_USERSPACE setting was inherited from some old default, and indeed is used by many older kernels. Only 5.8.x suddenly make Haswell and Broadwell run at 800 MHz. Skylake is not affected by this at all. With 5.4.x, the systems run at their nominal frequencies. If this is a desired change in kernel behaviour, then many people might see their systems slow down radically. -- You are receiving this mail because: You are the assignee for the bug.