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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 921D8C32771 for ; Tue, 7 Jan 2020 02:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6C6FD2072C for ; Tue, 7 Jan 2020 02:56:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727377AbgAGC4p (ORCPT ); Mon, 6 Jan 2020 21:56:45 -0500 Received: from mail-pj1-f46.google.com ([209.85.216.46]:54753 "EHLO mail-pj1-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727295AbgAGC4p (ORCPT ); Mon, 6 Jan 2020 21:56:45 -0500 Received: by mail-pj1-f46.google.com with SMTP id kx11so8363940pjb.4; Mon, 06 Jan 2020 18:56:45 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:autocrypt:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=iJ76xh6dRGBK5I51/f7xLqV7Am1vCLOQtohVIzZUhs0=; b=tcUBXVYW0iXGzle7lOQb3gX116Nm9GYntDNCYARuncmzEiMceoOxXE/XcWnt2hau1C pnSaxr8diGPWZvp0ThQrGYt3paJSvGvRiCcUftYKm8QQELTT1BAAJdo/EfC5HgfBMq0L CK3t7CoIT6DTExRkPj/8nFRayUdEsaLVhHs+wjI4AcXCpqLY002IgwRcuein9C6gJOnk qWcWbth6MHuWCetGqMhjFHDkacRYq6L51C6uYVFl63oE9RBqI6+6WS/Ul5PXWVAMYId0 iSYdNl+4K6o5hVutswVrUDXg3xdjyzcitDqYaHI5h74bZ+/K7s74RJZ+Y8DT5rItWfwl 6UtA== X-Gm-Message-State: APjAAAV61e64ikBR8hb60fpwuGHdhzv5QCZKr9i44KVFEXmhRt5Q2Q0M wJS4YPfab90KzduulgNm5NbGzam0 X-Google-Smtp-Source: APXvYqxripukSjQGamAIrAP694EGXArjWAZ6wHH+sB0hky5ju4qvObN+j805Tw0b8pvZdsGCy/GrCA== X-Received: by 2002:a17:90a:b106:: with SMTP id z6mr47155130pjq.91.1578365803636; Mon, 06 Jan 2020 18:56:43 -0800 (PST) Received: from ?IPv6:2601:647:4000:13e0:859b:a532:8457:1042? ([2601:647:4000:13e0:859b:a532:8457:1042]) by smtp.gmail.com with ESMTPSA id p17sm77626935pfn.31.2020.01.06.18.56.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Jan 2020 18:56:42 -0800 (PST) Subject: Re: Recent trace observed in target code during iSer testing To: "Marciniszyn, Mike" , "target-devel@vger.kernel.org" , "'linux-rdma@vger.kernel.org'" References: From: Bart Van Assche Autocrypt: addr=bvanassche@acm.org; prefer-encrypt=mutual; keydata= mQENBFSOu4oBCADcRWxVUvkkvRmmwTwIjIJvZOu6wNm+dz5AF4z0FHW2KNZL3oheO3P8UZWr LQOrCfRcK8e/sIs2Y2D3Lg/SL7qqbMehGEYcJptu6mKkywBfoYbtBkVoJ/jQsi2H0vBiiCOy fmxMHIPcYxaJdXxrOG2UO4B60Y/BzE6OrPDT44w4cZA9DH5xialliWU447Bts8TJNa3lZKS1 AvW1ZklbvJfAJJAwzDih35LxU2fcWbmhPa7EO2DCv/LM1B10GBB/oQB5kvlq4aA2PSIWkqz4 3SI5kCPSsygD6wKnbRsvNn2mIACva6VHdm62A7xel5dJRfpQjXj2snd1F/YNoNc66UUTABEB AAG0JEJhcnQgVmFuIEFzc2NoZSA8YnZhbmFzc2NoZUBhY20ub3JnPokBOQQTAQIAIwUCVI67 igIbAwcLCQgHAwIBBhUIAgkKCwQWAgMBAh4BAheAAAoJEHFcPTXFzhAJ8QkH/1AdXblKL65M Y1Zk1bYKnkAb4a98LxCPm/pJBilvci6boefwlBDZ2NZuuYWYgyrehMB5H+q+Kq4P0IBbTqTa jTPAANn62A6jwJ0FnCn6YaM9TZQjM1F7LoDX3v+oAkaoXuq0dQ4hnxQNu792bi6QyVdZUvKc macVFVgfK9n04mL7RzjO3f+X4midKt/s+G+IPr4DGlrq+WH27eDbpUR3aYRk8EgbgGKvQFdD CEBFJi+5ZKOArmJVBSk21RHDpqyz6Vit3rjep7c1SN8s7NhVi9cjkKmMDM7KYhXkWc10lKx2 RTkFI30rkDm4U+JpdAd2+tP3tjGf9AyGGinpzE2XY1K5AQ0EVI67igEIAKiSyd0nECrgz+H5 PcFDGYQpGDMTl8MOPCKw/F3diXPuj2eql4xSbAdbUCJzk2ETif5s3twT2ER8cUTEVOaCEUY3 eOiaFgQ+nGLx4BXqqGewikPJCe+UBjFnH1m2/IFn4T9jPZkV8xlkKmDUqMK5EV9n3eQLkn5g lco+FepTtmbkSCCjd91EfThVbNYpVQ5ZjdBCXN66CKyJDMJ85HVr5rmXG/nqriTh6cv1l1Js T7AFvvPjUPknS6d+BETMhTkbGzoyS+sywEsQAgA+BMCxBH4LvUmHYhpS+W6CiZ3ZMxjO8Hgc ++w1mLeRUvda3i4/U8wDT3SWuHcB3DWlcppECLkAEQEAAYkBHwQYAQIACQUCVI67igIbDAAK CRBxXD01xc4QCZ4dB/0QrnEasxjM0PGeXK5hcZMT9Eo998alUfn5XU0RQDYdwp6/kMEXMdmT oH0F0xB3SQ8WVSXA9rrc4EBvZruWQ+5/zjVrhhfUAx12CzL4oQ9Ro2k45daYaonKTANYG22y //x8dLe2Fv1By4SKGhmzwH87uXxbTJAUxiWIi1np0z3/RDnoVyfmfbbL1DY7zf2hYXLLzsJR mSsED/1nlJ9Oq5fALdNEPgDyPUerqHxcmIub+pF0AzJoYHK5punqpqfGmqPbjxrJLPJfHVKy goMj5DlBMoYqEgpbwdUYkH6QdizJJCur4icy8GUNbisFYABeoJ91pnD4IGei3MTdvINSZI5e Message-ID: <3b724797-275a-9a14-1503-1778780a5872@acm.org> Date: Mon, 6 Jan 2020 18:56:41 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On 2020-01-06 10:23, Marciniszyn, Mike wrote: > Seeing the following trace in some target testing for IB ulps: > > [28630.870878] ------------[ cut here ]------------ > [28630.876936] percpu_ref_kill_and_confirm called more than once on target_release_sess_cmd_refcnt [target_core_mod]! A candidate fix has been posted but needs review and/or a Tested-by. See also https://www.spinics.net/lists/target-devel/msg17981.html. Thanks, Bart.