From patchwork Sun Dec 29 17:18:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 11312275 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D834A139A for ; Sun, 29 Dec 2019 17:31:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7834207FF for ; Sun, 29 Dec 2019 17:31:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640664; bh=ABkLrZKoElGRtWFppwkvdptsazTThG4UmudwIkKFSsc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ECpH2sxsigTnS9JhcjnODH3r+gb236pf8OfEUHozxfIJLuFhYjTmj9OEsosNlt9K4 IneBq5zH68oW/1bhIQ2QF5KkLcexuXx+I8vPhnf5W09K2IohBIrbmJQWbtOPP5f1dI TOnc6QDSEwVkrtRlb5DTxWS0AbgpZFGzezYUhwjc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728809AbfL2RbE (ORCPT ); Sun, 29 Dec 2019 12:31:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:57794 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728633AbfL2RbD (ORCPT ); Sun, 29 Dec 2019 12:31:03 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3C9F0207FD; Sun, 29 Dec 2019 17:31:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640662; bh=ABkLrZKoElGRtWFppwkvdptsazTThG4UmudwIkKFSsc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0Ulz6EKdIn59ABN6hSXkecVjY2glMeg3mMMvU8rHnvmZIKwv6LWyY5vC3XIgJvlCK 307qFc3a0K3TGtAMib68ILiLaFJ2y4buqCKLJ7hdaCMglPM/rvIG2Ey2Y4foyPJ9px RSX9twpThS9PpG7koZ0djY08cMAdKFbQKNuASe/M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Benjamin Berg , Borislav Petkov , Hans de Goede , Christian Kellner , "H. Peter Anvin" , Ingo Molnar , linux-edac , Peter Zijlstra , Srinivas Pandruvada , Thomas Gleixner , Tony Luck , x86-ml , Sasha Levin Subject: [PATCH 4.19 085/219] x86/mce: Lower throttling MCE messages priority to warning Date: Sun, 29 Dec 2019 18:18:07 +0100 Message-Id: <20191229162518.333245399@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229162508.458551679@linuxfoundation.org> References: <20191229162508.458551679@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org From: Benjamin Berg [ Upstream commit 9c3bafaa1fd88e4dd2dba3735a1f1abb0f2c7bb7 ] On modern CPUs it is quite normal that the temperature limits are reached and the CPU is throttled. In fact, often the thermal design is not sufficient to cool the CPU at full load and limits can quickly be reached when a burst in load happens. This will even happen with technologies like RAPL limitting the long term power consumption of the package. Also, these limits are "softer", as Srinivas explains: "CPU temperature doesn't have to hit max(TjMax) to get these warnings. OEMs ha[ve] an ability to program a threshold where a thermal interrupt can be generated. In some systems the offset is 20C+ (Read only value). In recent systems, there is another offset on top of it which can be programmed by OS, once some agent can adjust power limits dynamically. By default this is set to low by the firmware, which I guess the prime motivation of Benjamin to submit the patch." So these messages do not usually indicate a hardware issue (e.g. insufficient cooling). Log them as warnings to avoid confusion about their severity. [ bp: Massage commit mesage. ] Signed-off-by: Benjamin Berg Signed-off-by: Borislav Petkov Reviewed-by: Hans de Goede Tested-by: Christian Kellner Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: linux-edac Cc: Peter Zijlstra Cc: Srinivas Pandruvada Cc: Thomas Gleixner Cc: Tony Luck Cc: x86-ml Link: https://lkml.kernel.org/r/20191009155424.249277-1-bberg@redhat.com Signed-off-by: Sasha Levin --- arch/x86/kernel/cpu/mcheck/therm_throt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c index ee229ceee745..ec6a07b04fdb 100644 --- a/arch/x86/kernel/cpu/mcheck/therm_throt.c +++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c @@ -185,7 +185,7 @@ static void therm_throt_process(bool new_event, int event, int level) /* if we just entered the thermal event */ if (new_event) { if (event == THERMAL_THROTTLING_EVENT) - pr_crit("CPU%d: %s temperature above threshold, cpu clock throttled (total events = %lu)\n", + pr_warn("CPU%d: %s temperature above threshold, cpu clock throttled (total events = %lu)\n", this_cpu, level == CORE_LEVEL ? "Core" : "Package", state->count);