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=-6.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8DE73C433DF for ; Tue, 4 Aug 2020 17:19:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6E349207FC for ; Tue, 4 Aug 2020 17:19:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Qeu8DaXi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730074AbgHDRTD (ORCPT ); Tue, 4 Aug 2020 13:19:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729932AbgHDRTB (ORCPT ); Tue, 4 Aug 2020 13:19:01 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D898CC06174A; Tue, 4 Aug 2020 10:19:00 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id d4so2557437pjx.5; Tue, 04 Aug 2020 10:19:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=U5FdYHnQn4brLQ5hjMPpg6pLPZ1R2CW8fGxgTfmznHs=; b=Qeu8DaXiAWiQjycLoHzq7YLRiTFai89xMgzzO5pg465Z3D1jbcSXKU7+/eFSByQB1T tqbkV8SR4BNC2fm0zNxH2MZ+jFxPV3D8NpwP4X1V2T4Jo9fuSriD4npae6n6+gzZ4TmG JJAmoH1xcxzw4LPx1wfOFNbpV/ea4v6myz4kEVrBoQv8C9zDGFItQDQA8I3lPbmBWpt5 ktxeNXoRgxDBCaSFv9dwZDlKunEDKKOE4fBxSCWr4Xwyj1lkwjseBnYF9LNWYe3/qtg2 dVh1I0OmlqYlhdbdLvnPMDWPknF5dfan+I202dt0gWU2pGca1FL83c9TGWmFBeSC2GWG uzTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=U5FdYHnQn4brLQ5hjMPpg6pLPZ1R2CW8fGxgTfmznHs=; b=tFU/M2LLJ7CDBhFimo401LKsYt1U4198qLlGJE7H7l4YqKL/C35ptFVfv4subZ9EPk 5+AKmLOPhJ/kUoQNSuqc5ZG5vB3VMqwP5S9+RhAP9ZEegSMXnhNqq55DNXozLXf6IEkC 7s45ZJ3imuF0Is17BFhsCFc7sh6y3FYbspjDlhwNTirvcXhVgy+BSvt692NzfNOXggsu vhksMFmuKaUf4RltZ5wZMBJ0CoQO25WaadMuXxqJj6HW7nAjAgH1KwcaQH/n8szeYKao cZ71afb2Agn/XC6f3SkHdun9tKyiGDf4cYBK7pDTc/7RvB8c8Aeo/Mm6vBE8UBMoJ24U Vung== X-Gm-Message-State: AOAM5322RP5BTkUu1xrNlVaQuzh4VWgyhPUZ+CIdyzVr6Pg8u8+PCEA8 QEEAm1bexzWpBDo5DqBMXtSICJih X-Google-Smtp-Source: ABdhPJxPHiarJ0+BxSJf9vz0js5Mmk6WC53mN/v2unDxZKL3y1q9JlInswKTs+oOwyFAZwZEWHBjQg== X-Received: by 2002:a17:90b:4b89:: with SMTP id lr9mr5763097pjb.190.1596561539604; Tue, 04 Aug 2020 10:18:59 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id y135sm13064000pfg.148.2020.08.04.10.18.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Aug 2020 10:18:58 -0700 (PDT) Subject: Re: iTCO watchdog last reboot reason? To: Naveen Kumar P Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org References: <83ff62ab-42c8-df6c-32c1-c1df2f8cda7a@roeck-us.net> From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; keydata= xsFNBE6H1WcBEACu6jIcw5kZ5dGeJ7E7B2uweQR/4FGxH10/H1O1+ApmcQ9i87XdZQiB9cpN RYHA7RCEK2dh6dDccykQk3bC90xXMPg+O3R+C/SkwcnUak1UZaeK/SwQbq/t0tkMzYDRxfJ7 nyFiKxUehbNF3r9qlJgPqONwX5vJy4/GvDHdddSCxV41P/ejsZ8PykxyJs98UWhF54tGRWFl 7i1xvaDB9lN5WTLRKSO7wICuLiSz5WZHXMkyF4d+/O5ll7yz/o/JxK5vO/sduYDIlFTvBZDh gzaEtNf5tQjsjG4io8E0Yq0ViobLkS2RTNZT8ICq/Jmvl0SpbHRvYwa2DhNsK0YjHFQBB0FX IdhdUEzNefcNcYvqigJpdICoP2e4yJSyflHFO4dr0OrdnGLe1Zi/8Xo/2+M1dSSEt196rXaC kwu2KgIgmkRBb3cp2vIBBIIowU8W3qC1+w+RdMUrZxKGWJ3juwcgveJlzMpMZNyM1jobSXZ0 VHGMNJ3MwXlrEFPXaYJgibcg6brM6wGfX/LBvc/haWw4yO24lT5eitm4UBdIy9pKkKmHHh7s jfZJkB5fWKVdoCv/omy6UyH6ykLOPFugl+hVL2Prf8xrXuZe1CMS7ID9Lc8FaL1ROIN/W8Vk BIsJMaWOhks//7d92Uf3EArDlDShwR2+D+AMon8NULuLBHiEUQARAQABzTJHdWVudGVyIFJv ZWNrIChMaW51eCBhY2NvdW50KSA8bGludXhAcm9lY2stdXMubmV0PsLBgQQTAQIAKwIbAwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4ACGQEFAlVcphcFCRmg06EACgkQyx8mb86fmYFg0RAA nzXJzuPkLJaOmSIzPAqqnutACchT/meCOgMEpS5oLf6xn5ySZkl23OxuhpMZTVX+49c9pvBx hpvl5bCWFu5qC1jC2eWRYU+aZZE4sxMaAGeWenQJsiG9lP8wkfCJP3ockNu0ZXXAXwIbY1O1 c+l11zQkZw89zNgWgKobKzrDMBFOYtAh0pAInZ9TSn7oA4Ctejouo5wUugmk8MrDtUVXmEA9 7f9fgKYSwl/H7dfKKsS1bDOpyJlqhEAH94BHJdK/b1tzwJCFAXFhMlmlbYEk8kWjcxQgDWMu GAthQzSuAyhqyZwFcOlMCNbAcTSQawSo3B9yM9mHJne5RrAbVz4TWLnEaX8gA5xK3uCNCeyI sqYuzA4OzcMwnnTASvzsGZoYHTFP3DQwf2nzxD6yBGCfwNGIYfS0i8YN8XcBgEcDFMWpOQhT Pu3HeztMnF3HXrc0t7e5rDW9zCh3k2PA6D2NV4fews9KDFhLlTfCVzf0PS1dRVVWM+4jVl6l HRIAgWp+2/f8dx5vPc4Ycp4IsZN0l1h9uT7qm1KTwz+sSl1zOqKD/BpfGNZfLRRxrXthvvY8 BltcuZ4+PGFTcRkMytUbMDFMF9Cjd2W9dXD35PEtvj8wnEyzIos8bbgtLrGTv/SYhmPpahJA l8hPhYvmAvpOmusUUyB30StsHIU2LLccUPPOwU0ETofVZwEQALlLbQeBDTDbwQYrj0gbx3bq 7kpKABxN2MqeuqGr02DpS9883d/t7ontxasXoEz2GTioevvRmllJlPQERVxM8gQoNg22twF7 pB/zsrIjxkE9heE4wYfN1AyzT+AxgYN6f8hVQ7Nrc9XgZZe+8IkuW/Nf64KzNJXnSH4u6nJM J2+Dt274YoFcXR1nG76Q259mKwzbCukKbd6piL+VsT/qBrLhZe9Ivbjq5WMdkQKnP7gYKCAi pNVJC4enWfivZsYupMd9qn7Uv/oCZDYoBTdMSBUblaLMwlcjnPpOYK5rfHvC4opxl+P/Vzyz 6WC2TLkPtKvYvXmdsI6rnEI4Uucg0Au/Ulg7aqqKhzGPIbVaL+U0Wk82nz6hz+WP2ggTrY1w ZlPlRt8WM9w6WfLf2j+PuGklj37m+KvaOEfLsF1v464dSpy1tQVHhhp8LFTxh/6RWkRIR2uF I4v3Xu/k5D0LhaZHpQ4C+xKsQxpTGuYh2tnRaRL14YMW1dlI3HfeB2gj7Yc8XdHh9vkpPyuT nY/ZsFbnvBtiw7GchKKri2gDhRb2QNNDyBnQn5mRFw7CyuFclAksOdV/sdpQnYlYcRQWOUGY HhQ5eqTRZjm9z+qQe/T0HQpmiPTqQcIaG/edgKVTUjITfA7AJMKLQHgp04Vylb+G6jocnQQX JqvvP09whbqrABEBAAHCwWUEGAECAA8CGwwFAlVcpi8FCRmg08MACgkQyx8mb86fmYHNRQ/+ J0OZsBYP4leJvQF8lx9zif+v4ZY/6C9tTcUv/KNAE5leyrD4IKbnV4PnbrVhjq861it/zRQW cFpWQszZyWRwNPWUUz7ejmm9lAwPbr8xWT4qMSA43VKQ7ZCeTQJ4TC8kjqtcbw41SjkjrcTG wF52zFO4bOWyovVAPncvV9eGA/vtnd3xEZXQiSt91kBSqK28yjxAqK/c3G6i7IX2rg6pzgqh hiH3/1qM2M/LSuqAv0Rwrt/k+pZXE+B4Ud42hwmMr0TfhNxG+X7YKvjKC+SjPjqp0CaztQ0H nsDLSLElVROxCd9m8CAUuHplgmR3seYCOrT4jriMFBtKNPtj2EE4DNV4s7k0Zy+6iRQ8G8ng QjsSqYJx8iAR8JRB7Gm2rQOMv8lSRdjva++GT0VLXtHULdlzg8VjDnFZ3lfz5PWEOeIMk7Rj trjv82EZtrhLuLjHRCaG50OOm0hwPSk1J64R8O3HjSLdertmw7eyAYOo4RuWJguYMg5DRnBk WkRwrSuCn7UG+qVWZeKEsFKFOkynOs3pVbcbq1pxbhk3TRWCGRU5JolI4ohy/7JV1TVbjiDI HP/aVnm6NC8of26P40Pg8EdAhajZnHHjA7FrJXsy3cyIGqvg9os4rNkUWmrCfLLsZDHD8FnU mDW4+i+XlNFUPUYMrIKi9joBhu18ssf5i5Q= Message-ID: Date: Tue, 4 Aug 2020 10:18:57 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/4/20 10:09 AM, Naveen Kumar P wrote: > On Tue, Aug 4, 2020 at 9:45 PM Guenter Roeck wrote: >> >> On 8/4/20 7:41 AM, Naveen Kumar P wrote: >>> [ Please keep me in CC as I'm not subscribed to the list] >>> >>> Hi everyone, >>> >>> I enabled the iTCO watchdog in my Linux system. >>> >>> sudo cat /dev/watchdog perfectly reboots my system. But, is there a >>> way to find out on each boot if the machine was rebooted due to a >>> watchdog timeout or not? >>> >>> Any ideas? >>> >> >> If the hardware supports it, the driver could set the reboot reason >> in its probe function. > Thank you Guenter for the quick response. Can you please point me to > the corresponding patch? I didn't say that one exists, nor that it is possible to actually implement what I suggested. I only stated a possibility. Please feel free to implement, test, and submit such a patch yourself. Thanks, Guenter