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[2620:137:e000::1:18]) by mx.google.com with ESMTPS id s2-20020a17090a760200b001bd14e01f35si6498361pjk.35.2022.03.16.21.07.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Mar 2022 21:07:58 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=hL0xJN5A; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CFC751EED5; Wed, 16 Mar 2022 20:48:14 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355549AbiCPMc2 (ORCPT + 99 others); Wed, 16 Mar 2022 08:32:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230190AbiCPMc1 (ORCPT ); Wed, 16 Mar 2022 08:32:27 -0400 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C05242EFB for ; Wed, 16 Mar 2022 05:31:13 -0700 (PDT) Received: from zn.tnic (p2e55dff8.dip0.t-ipconnect.de [46.85.223.248]) (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 DF1951EC03C9; Wed, 16 Mar 2022 13:31:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1647433867; 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=qMIjVS8BeT+tVF68txhAOz+wyR0Q9rCb1N6DeL44fX0=; b=hL0xJN5AWUiB2PAVXFw1YkEWFmhukb/TpUgO2lR32MjopasaopsK8BWvfEiqAnpqHlpNlT KVpOSumQqvKMydhvt4nWfk49njmZk0JCFOCdpV1AmuwUM416Kb+vsYPEfilGn/bOc6Gxwu miHQY35kWjsX1AjAwhPrdVAMgVPwnpE= Date: Wed, 16 Mar 2022 13:31:03 +0100 From: Borislav Petkov To: Jamie Heilman Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Dave Hansen , x86@kernel.org, Peter Zijlstra Subject: Re: system locks up with CONFIG_SLS=Y; 5.17.0-rc Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 16, 2022 at 09:51:35AM +0000, Jamie Heilman wrote: > I've been (somewhat unsuccessfully) trying to bisect a hard lock-up > of my workstation that occurs when I'm running 5.17 rc kernels a few > seconds after I start a kvm guest instance. There is no output to > any log, everything locks up completely, sysrq doesn't even work > anymore. Any chance you can connect that box with a serial cable, get serial console working and see if you can catch dmesg with it this way? https://www.kernel.org/doc/html/latest/admin-guide/serial-console.html Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette