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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 3B15DC433DF for ; Thu, 11 Jun 2020 16:18:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D23F20792 for ; Thu, 11 Jun 2020 16:18:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="WEAA1RLr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725873AbgFKQSG (ORCPT ); Thu, 11 Jun 2020 12:18:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbgFKQSG (ORCPT ); Thu, 11 Jun 2020 12:18:06 -0400 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17C57C08C5C1; Thu, 11 Jun 2020 09:18:06 -0700 (PDT) Received: from zn.tnic (p200300ec2f0bef0005d5b3018ae552bb.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:ef00:5d5:b301:8ae5:52bb]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 691831EC0301; Thu, 11 Jun 2020 18:18:04 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1591892284; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=RJ7GoAEedrAK4DvGOTYw+36v89yWRwjmeXLTFyITpDc=; b=WEAA1RLryyys5lbBBt7AxdJlwbKkwhspyf6IM1ftPSqXfF0uBlIVnVAiu/Lf7bYVpg5e4Y OSSj1pDbnCZ6xJFhp+oa9qxHNYy1domqNK3LLw+x1ByEFS8wfQF986hpLMwP2XtAvUApZ3 pg5E7+EOFrQDTa96aKwPOeosO1fKLu4= Date: Thu, 11 Jun 2020 18:17:58 +0200 From: Borislav Petkov To: Mario.Limonciello@dell.com Cc: pmenzel@molgen.mpg.de, tglx@linutronix.de, mingo@redhat.com, x86@kernel.org, linux-kernel@vger.kernel.org, hdegoede@redhat.com, ckellner@redhat.com, linux-pm@vger.kernel.org Subject: Re: Intel laptop: Starting with `maxcpus=1` and then bringing other CPUs online freezes system Message-ID: <20200611161758.GG30352@zn.tnic> References: <125e904a-088e-f111-00a4-95c3b18d882f@molgen.mpg.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Thu, Jun 11, 2020 at 01:13:27PM +0000, Mario.Limonciello@dell.com wrote: > From some other similar reports I've heard this could be related to the ucode > loading causing a freeze. I would suggest trying to disable the Intel ucode > loader with the initramfs as a debugging tactic. There's a cmdline param for that: "dis_ucode_ldr". -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette