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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BDA3C6FA8F for ; Wed, 30 Aug 2023 20:34:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239427AbjH3Uek (ORCPT ); Wed, 30 Aug 2023 16:34:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237231AbjH3Uej (ORCPT ); Wed, 30 Aug 2023 16:34:39 -0400 Received: from mail-il1-x133.google.com (mail-il1-x133.google.com [IPv6:2607:f8b0:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF7B15B81 for ; Wed, 30 Aug 2023 13:34:09 -0700 (PDT) Received: by mail-il1-x133.google.com with SMTP id e9e14a558f8ab-34df9c2748eso26665ab.0 for ; Wed, 30 Aug 2023 13:34:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1693427578; x=1694032378; darn=vger.kernel.org; h=mime-version:user-agent:message-id:in-reply-to:date:references :subject:cc:to:from:from:to:cc:subject:date:message-id:reply-to; bh=neliSw7qoh+YUhiPFUyH0EEqS3rYdeTkzSKzjqUjw8A=; b=Z65u+YRz1l6pJzF1+RoWCPc18jdeArFYsEpVczIgPMjManxRd5GvjJ9Nv6HRhJSAm1 1CA/3bB4lk+NOmjjBfJM8jfrMzDFoiB29/QRMAd3URa8TqmQIpRM8XsNj8GFjBjHGjUR G6NmxZy2vc08/b5ctfpirZBnj4GyAar7F9vxO8MZK4SaoXIys610Eod+/GReq51TFiYq /CdUNtSD5lS1hgVupLT03fPj17lVr1GAFyMLAZlk80REqw4auj0d65Q08UPO8dMbsTik 7+I1Z+bPuF/X3yIkM9j8C8S+Sd37GCHHl3j3tAOfOrZcAd1Tcq15AR2EnLIofOsGOkqD sOjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693427578; x=1694032378; h=mime-version:user-agent:message-id:in-reply-to:date:references :subject:cc:to:from:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=neliSw7qoh+YUhiPFUyH0EEqS3rYdeTkzSKzjqUjw8A=; b=XpZeAVh535gskDtAvRgQOW0aaMufhNPrjMITytt7VKC/OS3sN7aRWrpa4YHilrXe77 UgnUif73y6COZwp6dvnYZwVQfVquMmbsTUx1qUz4J5rQvFXQ7lKgC0yc1cnCYHg8TWZy vFp4Gq/eY1L9MK1Q1qfqTDwqkT3SScIJdJTBhqqravPVjhTpaJ5D5m5fPxcKWN4ZcUj8 3ckatnQ4lPkheRlATlbE8zijtMEoqZod6gexQ/2QkNyDEQFl+bHHr+08bASgfPjrdpGq F/rW6ahnGSpPnIgo9B4diZjF11nhprz5y4tuONuY+FjrQCfD8D32M+lOldAWAamCMLzf Lr5g== X-Gm-Message-State: AOJu0Yy/BrkpOFOjkqI98i0Yp+VO7D+YKNsbQJpXY8D75edG2stKJhag NYNzXEmdzlS8LgUxMqKgj2oC40nXp+95Zbau04DVWA== X-Google-Smtp-Source: AGHT+IEtPBJyW+fxDSwfhZLVKMbrw+fx+hC8DUP+9B7LnqUilulxgXIOq0VIs7hNfhDbzxT0E54wrg== X-Received: by 2002:a17:902:e551:b0:1c1:efe5:cce5 with SMTP id n17-20020a170902e55100b001c1efe5cce5mr28280plf.3.1693422989246; Wed, 30 Aug 2023 12:16:29 -0700 (PDT) Received: from bsegall-glaptop.localhost (c-73-158-249-138.hsd1.ca.comcast.net. [73.158.249.138]) by smtp.gmail.com with ESMTPSA id f4-20020aa782c4000000b0068a0922b1f0sm10343368pfn.137.2023.08.30.12.16.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Aug 2023 12:16:28 -0700 (PDT) From: Benjamin Segall To: Bagas Sanjaya Cc: Hao Jia , Vincent Guittot , "Peter Zijlstra (Intel)" , Igor Raits , Linux Kernel Mailing List , Linux Regressions , Linux Stable Subject: Re: Fwd: WARNING: CPU: 13 PID: 3837105 at kernel/sched/sched.h:1561 __cfsb_csd_unthrottle+0x149/0x160 References: Date: Wed, 30 Aug 2023 12:16:24 -0700 In-Reply-To: (Bagas Sanjaya's message of "Wed, 30 Aug 2023 07:37:49 +0700") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Bagas Sanjaya writes: > Hi, > > I notice a regression report on Bugzilla [1]. Quoting from it: > >> Hello, we recently got a few kernel crashes with following backtrace. Happened on 6.4.12 (and 6.4.11 I think) but did not happen (I think) on 6.4.4. >> >> [293790.928007] ------------[ cut here ]------------ >> [293790.929905] rq->clock_update_flags & RQCF_ACT_SKIP >> [293790.929919] WARNING: CPU: 13 PID: 3837105 at kernel/sched/sched.h:1561 __cfsb_csd_unthrottle+0x149/0x160 >> [293790.933694] Modules linked in: [...] >> [293790.946262] Unloaded tainted modules: edac_mce_amd(E):1 >> [293790.956625] CPU: 13 PID: 3837105 Comm: QueryWorker-30f Tainted: G W E 6.4.12-1.gdc.el9.x86_64 #1 >> [293790.957963] Hardware name: RDO OpenStack Compute/RHEL, BIOS edk2-20230301gitf80f052277c8-2.el9 03/01/2023 >> [293790.959681] RIP: 0010:__cfsb_csd_unthrottle+0x149/0x160 > > See Bugzilla for the full thread. > > Anyway, I'm adding this regression to regzbot: > > #regzbot introduced: ebb83d84e49b54 https://bugzilla.kernel.org/show_bug.cgi?id=217843 > > Thanks. > > [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217843 The code in question is literally "rq_lock; update_rq_clock; rq_clock_start_loop_update (the warning)", which suggests to me that RQCF_ACT_SKIP is somehow leaking from somewhere else?