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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 AF9B6C47254 for ; Sat, 2 May 2020 00:03:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B0FA208DB for ; Sat, 2 May 2020 00:03:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727097AbgEBADx (ORCPT ); Fri, 1 May 2020 20:03:53 -0400 Received: from mga12.intel.com ([192.55.52.136]:23947 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726437AbgEBADw (ORCPT ); Fri, 1 May 2020 20:03:52 -0400 IronPort-SDR: w+JaYkrsklYnu+WTvaWXxY7mlzm+zTOXdcXaRHh/T97gr23vSWHpxvSit5k9E1QM4dyR6ejibb j75lw+s7CxMw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 May 2020 17:03:52 -0700 IronPort-SDR: 3rgefx24t0xzK5AFJhBE8FFAt7fW+8zYHVDdpAlxca0bsfHckSLU21AtWDiKaoGZU5sszVnJ0a /yaGiFdgUSjg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,342,1583222400"; d="scan'208";a="405889455" Received: from ranerica-svr.sc.intel.com ([172.25.110.23]) by orsmga004.jf.intel.com with ESMTP; 01 May 2020 17:03:51 -0700 Date: Fri, 1 May 2020 17:04:23 -0700 From: Ricardo Neri To: Giovanni Gherdovich Cc: Srinivas Pandruvada , Thomas Gleixner , Ingo Molnar , Peter Zijlstra , Borislav Petkov , Len Brown , "Rafael J . Wysocki" , x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Linus Torvalds Subject: Re: [PATCH 2/2] x86, sched: Bail out of frequency invariance if turbo frequency is unknown Message-ID: <20200502000423.GA3118@ranerica-svr.sc.intel.com> References: <20200428132450.24901-1-ggherdovich@suse.cz> <20200428132450.24901-3-ggherdovich@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200428132450.24901-3-ggherdovich@suse.cz> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 28, 2020 at 03:24:50PM +0200, Giovanni Gherdovich wrote: > There may be CPUs that support turbo boost but don't declare any turbo > ratio, i.e. their MSR_TURBO_RATIO_LIMIT is all zeroes. In that condition > scale-invariant calculations can't be performed. > > Signed-off-by: Giovanni Gherdovich > Suggested-by: Ricardo Neri Thanks for implementing this, Giovanni! Tested-by: Ricardo Neri