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=-13.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 039ECC433B4 for ; Fri, 21 May 2021 08:50:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2E1E613AC for ; Fri, 21 May 2021 08:50:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233184AbhEUIvg (ORCPT ); Fri, 21 May 2021 04:51:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230317AbhEUIve (ORCPT ); Fri, 21 May 2021 04:51:34 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2629AC061574 for ; Fri, 21 May 2021 01:50:09 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id cu11-20020a17090afa8bb029015d5d5d2175so6964314pjb.3 for ; Fri, 21 May 2021 01:50:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Z+pNd8iiKn7fyjmLzbAXru7lbppAXi9Y4DYZJ4cZYbI=; b=QqKzCjwO7SBetuZ/52HQXYCXl65z6cjRzwx7dfDOuQKlPUjYl75GW/n7eXjrhzP4XK 7HH37dPidegrGSpLfV8dZoAvBRZXdohd5pPX4CZXCFKHQUi/yo8l7p6IxXGg3WLk5qAr B0fB7eMQeoyV9T53XeSHQvypm6ONWvFmpEyqeK2BLWv3PurEzVSwX6CV8lApOpIJVDl9 YJvsqidILxlvBBQv6oky3Kdazrd0+CvqOH5IH/hjfv7PQr/dNkEzw5/LSkKesMXx/VHc HNbpIGdoECoO9SjjmLg369x1uYxG7+XUe1ZLu/WIeIydJVtmYup5WV3/Uu0Nqk1wKQ+9 KmWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Z+pNd8iiKn7fyjmLzbAXru7lbppAXi9Y4DYZJ4cZYbI=; b=It6N2nB6yl/essVUjB1iSBwgccQsD1qQk2fqpTX4D0ldQ2/a96r65WecClG3sffv2a eY/X2j8ZlQRfdpedQ6ZsA8SD6paQTXs89B5jgFyV98PM/LB8iEQqSyxT3FKUP9+IKYv8 GCgsVq0KKoDqoxbdvQW2OD4Kic/9xv0B0z4gUzZtx7csJ8U6PFGteW3Y2SSMap0LMeOI utpa0fNYZqw9f+vahHBmnH2YIw1/R8DOx5iSBEHhs32TFMF+8XoL289btXTxOG4xUS7Q NXVDDbefOFu1Z3AglWuOjwkZ82mCg4L+U8ZdLDNAC2JCvBgoJ48IJrfdYyieMlwKr52C xabQ== X-Gm-Message-State: AOAM531oiWjTVi3/qpFNdMklvZ32TYtfuAHMYzgHJnb5MK8sejBTOfTK xL2l11sNEuJzBkc3AZ31Ja8qSQ== X-Google-Smtp-Source: ABdhPJxTH/EUjEEsKboooGZ1Xc0iz18xdDFrb5WRT5TAC3wWaXiQuV2kz2z5+VbiHKmItXbvREJh3w== X-Received: by 2002:a17:903:30c4:b029:ef:82f1:cb28 with SMTP id s4-20020a17090330c4b02900ef82f1cb28mr10984611plc.19.1621587008404; Fri, 21 May 2021 01:50:08 -0700 (PDT) Received: from google.com ([2401:fa00:fc:202:f654:3898:11e:aa15]) by smtp.gmail.com with ESMTPSA id f13sm3796911pfa.207.2021.05.21.01.50.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 May 2021 01:50:07 -0700 (PDT) Date: Fri, 21 May 2021 16:50:00 +0800 From: Martin Liu To: Petr Mladek Cc: Andrew Morton , Nathan Chancellor , Nick Desaulniers , Tejun Heo , minchan@google.com, www@google.com, davidchao@google.com, jenhaochen@google.com, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH] kthread: Fix kthread_mod_delayed_work vs kthread_cancel_delayed_work_sync race Message-ID: References: <20210513065458.941403-1-liumartin@google.com> <20210520144845.52755f3af700a902e07e2ee7@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 21, 2021 at 09:12:30AM +0200, Petr Mladek wrote: > On Thu 2021-05-20 14:48:45, Andrew Morton wrote: > > On Thu, 13 May 2021 14:54:57 +0800 Martin Liu wrote: > > > > > We encountered a system hang issue while doing the tests. The callstack > > > is as following > > > > > > ... > > > > > > Fixes: 37be45d49dec2 ("kthread: allow to cancel kthread work") > > > > Thanks. I added a cc:stable to this and shall hold it in -mm for a > > couple of weeks to get exposure and testing before sending it to Linus > > for 5.13. > > Sounds good to me. Thanks for taking care of it. > > Best Regards, > Petr Hi Petr, Andrew Thanks for your help! :)