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[23.128.96.18]) by mx.google.com with ESMTP id y4si3540375edi.166.2020.04.22.08.05.57; Wed, 22 Apr 2020 08:06:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2020-01-29 header.b=t1f11tze; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727057AbgDVONU (ORCPT + 99 others); Wed, 22 Apr 2020 10:13:20 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:59042 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726023AbgDVONT (ORCPT ); Wed, 22 Apr 2020 10:13:19 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 03MDwgoI055667; Wed, 22 Apr 2020 14:12:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=ZV2dTZE76GuHVFcrIlNmPhF2BlnBeLy7oz/maxvdvFo=; b=t1f11tze3ABFON+3ypjcoF2u3DqtWifTu+VWgLn5s57ySZt4gq8R07mUJuPRs09jC2hP yP/Mqv8lqPrPyqtynR7ixbKmP/zCn/AXUm+U1IVQhcQagcYEkGG5sHj5SGZs6i9DLeTP XJsyMk3DBiKLHuzWkF/yy8ptDv+r/9tc5EzxMw0MZQPIwijE+75vukDMEhqKo5GktlvR JBoYYqOBRzUjVrJqA5LVEEjif6VYlnF2cG5ayHiHtwBhcCLCT7LUzB9NG9LAyS9In61D q6XMUR4SmQyQzClG6a7mLCpXceq5kdpx6wBCfKe8LSYwhxBXiLkUbdHWijcss2Hs/8lm Sw== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 30jhyc1wjs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 22 Apr 2020 14:12:51 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 03ME8RP7114346; Wed, 22 Apr 2020 14:12:50 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3030.oracle.com with ESMTP id 30gb1jn4dh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 22 Apr 2020 14:12:50 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 03MECnYb016668; Wed, 22 Apr 2020 14:12:49 GMT Received: from [192.168.0.190] (/68.201.65.98) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 22 Apr 2020 07:12:48 -0700 Subject: Re: [BISECTED]: Kernel panic (was: Linux 5.7-rc2) To: Giovanni Gherdovich , Peter Zijlstra , Linus Torvalds , Harald Arnesen Cc: Ingo Molnar , "Rafael J. Wysocki" , Linux Kernel Mailing List References: <428bac87-b6dd-0867-c8f8-622cd606de3e@skogtun.org> <20200421212347.GV2483@worktop.programming.kicks-ass.net> <1587546150.9537.84.camel@suse.cz> From: Dave Kleikamp Autocrypt: addr=dave.kleikamp@oracle.com; prefer-encrypt=mutual; keydata= mQINBE7VCEMBEAC3kywrdIxxL/I9maTCxaWTBiHZFNhT5K8QZGLUfW3uFrW89PdAtloSEc1W ScC9O+D2Ygqwx46ZVA7qMXHxpNQ6IZp8he88gQ9lilWD8OJ/T3OKyT6ITdkmsgv6G08QdGCP 0+mCpETv79kcj+Z4pzKLN5QyKW40R3LGcJ6a+0AG5As5/ZkmhceSffdSyDS6zKff3c6cgfQH zl+ugygdKItr3UGIfxuzF3b9uYicsVStwIxyuyzY8i1yYYnnXZtWkI9ZwxT+00PqjCvfVioy xswoscukLQntlkfd4gwM8t56RIxqEo4iNmFwmBYHlSd7C+8SrvPAOgvOtr1vjzJhEsJ2uJNW O2pgZc8xMxe8vhyZK1Nih67hbtzSIpFij06zHwAt4AY3sCbWslOExb8JboINWhI89QcgNmMK uwLHag3D/zZQXQIBvC5H27T49NA6scA92j2qFO6Beks3n/HW6TJni/S9sUXRghRiGDdc/pFr 20R3ivRzKyYBoSWl/3Syo0JcWdEpqq6ti/5MTRFZ+HQjwgUGZ5w+Xu2ttq/q9MyjD4odfKuF WoXk3bF+9LozDNkRi+JxCNT9+D4lsm3kdFTUXHf/qU/iHTPjwYZd6UQeCHJPN6fpjiXolF+u qIwOed8g8nXEXKGafIl3zsAzXBeXKZwECi9VPOxT4vrGHnlTHwARAQABtDZEYXZpZCBLbGVp a2FtcCAoQUtBIFNoYWdneSkgPGRhdmUua2xlaWthbXBAb3JhY2xlLmNvbT6JAjgEEwECACIF Ak7VCEMCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEDaohF61QIxkpSsP/3DtjVT0 4vPPB7WWGWapnIb8INUvMJX84y4jziAk9dSESdPavYguES9KLOTXmAGIVwuZj5UtUNie4Q3V fZp7Mc7Lb3sf9r2fIlVJXVhQwMFjPYkPLbQBAtHlnt8TClkF2te47tVWuDqI4R0pwACKhUht lQRXpJy7/8pHdNfHyBLOqw6ica8R+On9KkcEJCE+e8XiveAC+2+YcZyRwrj0dTfWEQI6CNwW kax4AtXo/+NigwdU0OXopLDpyro7wIVt3gWLPV99Bo387PPyeWUSZOH6kHIXyYky51zzoZF3 1XuX3UvObx7i/f3uH0jd3O/0/h2iHB9QxmykJBG7AJcF5KiunAL+91a0bqr9IHiffDo0oAme 9JFKOrkcODnnWuHABB6U4pT2JQRF199/Vt4qR+kvuo+xy0eO+0CHEhQWfyFyxz8nQJlizq9p jnzaWe8tAbJz2WqB2CNBhLI7Qn8cAEM66v2aRCnJZ4Uty7HRDnIbQ0ixUxLNIAWM8N4C6w2I RxLfIfNqTTqEcz2m2fg8wSiNuFh17HfzFM/ltXs4wJ610IhwXuPPsA2V/j2pT8GDhn/rMAGN IbO8iEbDO+gKpN47r+OVjxq3fWbRc2ouqRN+fHgvLYt1xcZnPD/sGyLJpMdSHlpCpgKr3ijA y16pnepPaVCTY1FTvNCkZ6hmGvuDuQINBE7VCEMBEADEsrKHN4cTmb0Lz4//ah9WMCvZXWD3 2EWhMh+Pqr+yin7Ga77K5FtgirKjYOtymXeMw640cqp6DaIo+N6KPWM2bsos12nIfN9BWisb XhPMmYZtoYALMjn3CYvE01N+Ym/SDFsfjAu3WtbefEC/Hjw2hlCfPMotU1wkfGEgapkFcGsG MxDjdZN7dSkBH1dKkG3Cx7Cni8qn0Q3oJzSfR6H2KZZZWiJGV70WKWE01yQCYLHfbPMQKS1u qTEaCND/iDjZvbungBUR1kg43CpbzpWlY28AuZrNmGpar4h5YwbiJO2fR7WgiDYmXqxQ8DXY uxndrmTOQqj8EizkOifINWQvouMaasKLIK+U38YCG5stImSmKfjBxrICgXITp/YS4/i1yR3r HthdQ5hZVfCDxKjR8knv+6A37588mYE6DTBpFh9To4baNo3N4ikkg4+bAcO/5v3QiFsCdh3H hR9zlBgy2jOUFYSdSxhXx2y0NUxQSUOpw59sqgBFmgTi2FscchgBraujpu7JE8TdOdSMPSNG Dqx8G5a1g3Ot6+HxgQM8LsZ5qq3BGUDB0DLHtMVu3r9x2327QSp/q2CgwPn2XzelQ0yNolAt 6wjbQwZXTGIGQGlpAFk7UOED/je8ANKYCkE0ZdqQigyoQFEZtyjYxzIzJRWLl4lJjhBSar1v TiSreQARAQABiQIfBBgBAgAJBQJO1QhDAhsMAAoJEDaohF61QIxk/DsP/RjCZHGEsiX0uHxu JzPglNp9mjgG5dGmgYn0ERSat4bcTQV5iJN2Qcn1hP5fJxKg55T8+cFYhFJ1dSvyBVvatee7 /A2IcNAIBBTYCPYcBC771KAU/JOokYu2lkrGM2SXq4XxpfDzohOS3LDGif47TYpEKWbP4AHq vcIl9CYvnhnbV+B/SxqhH7iYB6q2bqY6ki7fsk2lK65FFhlkkgsKyeOiuaVNEv3tmPCMAY/v oMAsCTLK63Wsd9pUY2SGt2ACIy7pTq+k1b09cqlTM2vux8/R0HNzQBXNcFiKKz+JNVObP30N /hsLs0+Ko9f/2OcixfkGjdih8I+FnRdS6wAO7k6g+tTBOj/sbSbH+eZbxWwANkiFkykOASGA /4RzIDie72NiM8lKzpyrlaruSFxuj9/wZuCT7jaYIaiOMPy7Y0Lpisy/hRhwDCNlKU6Hcr7k hQ1cIx4CB40fwqjbK61tWrqZR47pDKShl5DBRdeX/1a+WHXzDLVE4sfax5xL2wjiCUfEyH7x 9YJoKXbnOlKuzjsm9lZIwVwqw07Qi1uFmzJopHW0H3P6zUlujM0buDmaio+Q8znJchizOrQ3 58pn7BNKx3mmswoyZlDtukab9QGF7BZBMjwmafn1RuEVGdlSB52F8TShLgKUM+0dkFmI2yf/ rnNNL3zBkwD3nWcTxFnX Message-ID: <5b9531e1-e0ae-cf5d-84f2-6bbb5c2cd089@oracle.com> Date: Wed, 22 Apr 2020 09:12:48 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <1587546150.9537.84.camel@suse.cz> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9598 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 malwarescore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004220112 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9598 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 spamscore=0 mlxscore=0 clxscore=1011 suspectscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004220112 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/22/20 4:02 AM, Giovanni Gherdovich wrote: > Linus, Peter: > > the panic seen by Harald Arnesen (and Dave Kleikamp) is unrelated to > virtualization, and happens on all machines that have a CPU with less than 4 > physical cores. It's a very serious (and very stupid) bug in the original > version of my code and is fixed by patch 2/4 "x86, sched: Account for CPUs > with less than 4 cores in freq. invariance" in the series > > https://lore.kernel.org/lkml/20200416054745.740-1-ggherdovich@suse.cz > > Harald, Dave: > > for peace of mind, can you please share the output of > > turbostat --interval 1 sleep 0 This is a Lenovo T410. turbostat version 20.03.20 - Len Brown CPUID(0): GenuineIntel 0xb CPUID levels; 0x80000008 xlevels; family:model:stepping 0x6:25:5 (6:37:5) CPUID(1): SSE3 MONITOR SMX EIST TM2 TSC MSR ACPI-TM HT TM CPUID(6): APERF, TURBO, DTS, No-PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, No-EPB cpu0: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT PREFETCH TURBO) CPUID(7): No-SGX cpu0: MSR_MISC_PWR_MGMT: 0x00400000 (ENable-EIST_Coordination DISable-EPB DISable-OOB) cpu0: MSR_PLATFORM_INFO: 0x90020011200 9 * 133.3 = 1200.0 MHz max efficiency frequency 18 * 133.3 = 2399.9 MHz base frequency cpu0: MSR_IA32_POWER_CTL: 0x00000000 (C1E auto-promotion: DISabled) cpu0: MSR_TURBO_RATIO_LIMIT: 0x00001416 20 * 133.3 = 2666.6 MHz max turbo 2 active cores 22 * 133.3 = 2933.3 MHz max turbo 1 active cores cpu0: MSR_PKG_CST_CONFIG_CONTROL: 0x00000403 (UNlocked, pkg-cstate-limit=3 (pc6)) current_driver: intel_idle current_governor_ro: menu cpu0: POLL: CPUIDLE CORE POLL IDLE cpu0: C1: MWAIT 0x00 cpu0: C1E: MWAIT 0x01 cpu0: C3: MWAIT 0x10 cpu0: C6: MWAIT 0x20 cpu0: cpufreq driver: acpi-cpufreq cpu0: cpufreq governor: ondemand cpufreq boost: 1 cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x00690a00 (105 C) 0.001871 sec Node Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz IRQ SMI POLL C1 C1E C3 C6 POLL% C1% C1E% C3% C6% CPU%c1 CPU%c3 CPU%c6 CoreTmp Pkg%pc3 Pkg%pc6 - - - 395 26.14 1493 2430 12 0 0 1 1 10 0 0.00 1.50 0.59 73.54 0.00 28.45 45.41 0.00 63 0.00 0.00 -1 0 0 239 16.27 1473 2397 3 0 0 1 0 2 0 0.00 5.92 0.00 79.10 0.00 51.50 32.23 0.00 62 0.00 0.00 -1 0 1 784 50.12 1574 2385 3 0 0 0 1 2 0 0.00 0.00 2.37 47.20 0.00 17.26 -1 2 2 171 10.80 1598 2373 2 0 0 0 0 2 0 0.00 0.00 0.00 90.00 0.00 30.33 58.88 0.00 63 -1 2 3 358 27.42 1319 2377 4 0 0 0 0 4 0 0.00 0.00 0.00 72.18 0.00 14.64