Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp2684616rwd; Wed, 14 Jun 2023 06:15:33 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5uAZYmvhNM/+3k5DQelJBuFJoPxJm19ihCUfGelTs04Eb3a+/Li62hh8g4FnyMB2fMh+t2 X-Received: by 2002:a2e:9d8a:0:b0:2ad:95dd:8802 with SMTP id c10-20020a2e9d8a000000b002ad95dd8802mr6343896ljj.38.1686748532786; Wed, 14 Jun 2023 06:15:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1686748532; cv=none; d=google.com; s=arc-20160816; b=FUt0FMOKOnYkIH2Ni2/gpOH6tEgD/v8ehSK0Qi75DI/GVG4dwKEys9moClzHtzJUdo xW1WCWNfwZYMMMrMkzIjlvCGIERoNLKBKoEauLL4CzymhQmwXHchNHyO9ZnHss91+WCM J52o/BKi235Zg1sLykoXwKciq7GrWhRDrucX3sHyGDktX8W/3mfvjtLxZU8tBRV6qUFt 96pI+In3AOaYDs6zGfxeJiLHdJGdQQ7ESOf7YBM75PhWU/PjBy6rO+bFi5ktdJOYSWvN hPXmqHoylwnjkTwympzUxJeK9sgc0AZFsURZ5lpScZlxzn9sV6z9Cg3HrQXWpsv6O4EQ wQYA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to:from :references:cc:to:content-language:subject:user-agent:mime-version :date:message-id:dkim-signature; bh=IaVCMsTsgBXgcxaR6Mk8JuSrSs/kMPQ7cemUYFW/TgY=; b=tYhex8aD32/qeyMHqOBUjJJWOt7ePsUbN7O2rzRIaK4GTTDSCXfhtGesiGXrgs8VPy ohWvO27xIYigLOw5kp+jYFRUVT2WPGVMFqo862UYvAPwp+lmR2r0lVTPotDQbbnvCTAV Sk8ySIYhbMIuAhsifeWTcqtvOvOEN7wt4JBH+L2suRM0dKY4Ag780RcbE4GgfaAxgdZH oy7qstSvz6ZylC6usJfpd84hGfmBozB4ZW7WvbohUCydhtvNCa8AQ/aJFQdEp/v6L00U UOTEpb1lJ6+iHg0mGNLa2BSNOMwsvWz+N53JSP3HDSKrqycoI8zjtwUPnU+ybZLVcszX f35A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@amazon.com header.s=amazon201209 header.b="VF/LLFRR"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id p17-20020a056402075100b005149b9127c8si8153466edy.549.2023.06.14.06.15.01; Wed, 14 Jun 2023 06:15:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@amazon.com header.s=amazon201209 header.b="VF/LLFRR"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244489AbjFNNKX (ORCPT + 99 others); Wed, 14 Jun 2023 09:10:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244455AbjFNNKS (ORCPT ); Wed, 14 Jun 2023 09:10:18 -0400 Received: from smtp-fw-80009.amazon.com (smtp-fw-80009.amazon.com [99.78.197.220]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ADA671BE8; Wed, 14 Jun 2023 06:10:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1686748217; x=1718284217; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=IaVCMsTsgBXgcxaR6Mk8JuSrSs/kMPQ7cemUYFW/TgY=; b=VF/LLFRRq6cb3E30vLf5LChBVBa/dmIFe462b1KsOkqiVA9CkGyhR/6V fody9NOkWePdlDn05e6yqEFmTxndg239vxrtAGYamm2RCYdt5l1IDSToH R6iZWnEcC9b86UYEL3VhPYZGKgq6M7ZRAAFAD08VthwudGwpReFpwef4n A=; X-IronPort-AV: E=Sophos;i="6.00,242,1681171200"; d="scan'208";a="10081887" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO email-inbound-relay-iad-1a-m6i4x-b5bd57cf.us-east-1.amazon.com) ([10.25.36.214]) by smtp-border-fw-80009.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 13:10:15 +0000 Received: from EX19MTAUEC002.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan3.iad.amazon.com [10.40.163.38]) by email-inbound-relay-iad-1a-m6i4x-b5bd57cf.us-east-1.amazon.com (Postfix) with ESMTPS id 3461D4679E; Wed, 14 Jun 2023 13:10:12 +0000 (UTC) Received: from EX19D028UEC003.ant.amazon.com (10.252.137.159) by EX19MTAUEC002.ant.amazon.com (10.252.135.253) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 13:10:12 +0000 Received: from [10.95.176.26] (10.95.176.26) by EX19D028UEC003.ant.amazon.com (10.252.137.159) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 14 Jun 2023 13:10:10 +0000 Message-ID: <4c4178a1-1050-ced4-e6fb-f95c3bdefc98@amazon.com> Date: Wed, 14 Jun 2023 09:10:08 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.2 Subject: Re: Observing RCU stalls in kernel 5.4/5.10/5.15/6.1 stable trees Content-Language: en-US To: Sebastian Andrzej Siewior , "gregkh@linuxfoundation.org" CC: "Bhatnagar, Rishabh" , "linux-kernel@vger.kernel.org" , "tglx@linutronix.de" , "sashal@kernel.org" , , "stable@vger.kernel.org" References: <12c6f9a3-d087-b824-0d05-0d18c9bc1bf3@amazon.com> <2023061428-compacter-economic-b648@gregkh> <20230614092045.tNY8USjq@linutronix.de> From: Luiz Capitulino In-Reply-To: <20230614092045.tNY8USjq@linutronix.de> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.95.176.26] X-ClientProxiedBy: EX19D044UWA004.ant.amazon.com (10.13.139.7) To EX19D028UEC003.ant.amazon.com (10.252.137.159) X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham 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 2023-06-14 05:20, Sebastian Andrzej Siewior wrote: > > > On 2023-06-14 11:14:49 [+0200], gregkh@linuxfoundation.org wrote: >> Oops, missed this. >> >> Yes, there might be, can you do 'git bisect' and track down the patch >> that fixed this? > > There was a report of a lockup during boot in VMs yesterday. If I > remember correctly this still exists and might be related to this > report. I'm going to have a look. Thanks, Sebastian. Do you have a link for the discussion? - Luiz