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=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 7870CC4346E for ; Thu, 24 Sep 2020 07:43:22 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 40C7923741 for ; Thu, 24 Sep 2020 07:43:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 40C7923741 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=bugzilla.kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4Bxn8k6RFFzDqRF for ; Thu, 24 Sep 2020 17:43:18 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=srs0=r/5u=db=bugzilla.kernel.org=bugzilla-daemon@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=bugzilla.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Bxn6j5JRTzDqPT for ; Thu, 24 Sep 2020 17:41:33 +1000 (AEST) From: bugzilla-daemon@bugzilla.kernel.org To: linuxppc-dev@lists.ozlabs.org Subject: [Bug 195755] rcu_sched detected stalls on CPUs/tasks: (detected by 0, t=6302 jiffies, g=11405, c=11404, q=1880), ppc64, G5 Date: Thu, 24 Sep 2020 07:41:29 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Product: Platform Specific/Hardware X-Bugzilla-Component: PPC-64 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nigel@nigelreed.net X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" https://bugzilla.kernel.org/show_bug.cgi?id=3D195755 Nigel Reed (nigel@nigelreed.net) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |nigel@nigelreed.net --- Comment #29 from Nigel Reed (nigel@nigelreed.net) --- I know this is old but I have been having some issues for a while, I was finally able to get something useful: [165716.089703] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [165716.095949] rcu: 1-...!: (0 ticks this GP) idle=3D354/0/0x0 softirq=3D2154363/2154363 fqs=3D0 [165716.104512] rcu: 3-...!: (0 ticks this GP) idle=3D29c/0/0x0 softirq=3D883832/883832 fqs=3D0 [165716.112873] rcu: 4-...!: (8 GPs behind) idle=3Dad8/0/0x0 softirq=3D2165586/2165586 fqs=3D0 [165716.121179] rcu: 9-...!: (9 GPs behind) idle=3Dacc/0/0x0 softirq=3D1340600/1340600 fqs=3D0 [165716.129467] rcu: 11-...!: (2 GPs behind) idle=3Da18/0/0x0 softirq=3D4538536/4538537 fqs=3D0 [165716.137828] rcu: 12-...!: (0 ticks this GP) idle=3D870/0/0x0 softirq=3D2158040/2158040 fqs=3D0 [165775.697763] rcu: rcu_sched kthread starved for 29898 jiffies! g36134941 f0x0 RCU_GP_WAIT_FQS(5) ->state=3D0x402 ->cpu=3D3 [165775.709013] rcu: RCU grace-period kthread stack dump: [165837.494623] watchdog: BUG: soft lockup - CPU#6 stuck for 23s! [(resolved):52315] [165865.494840] watchdog: BUG: soft lockup - CPU#6 stuck for 23s! [(resolved):52315] This happened just after freshclam ran but I don't know if it's related. This is with a Ryzen 7 1800X CPU. 5.4.0-48-generic #52-Ubuntu I thought I had sysrq configured but it seems not so I can't really provide= any more information, other than this is driving me crazy. --=20 You are receiving this mail because: You are watching the assignee of the bug.=