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=-9.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 2E759C4707A for ; Fri, 21 May 2021 14:30:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C4C9613DD for ; Fri, 21 May 2021 14:30:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236802AbhEUObo (ORCPT ); Fri, 21 May 2021 10:31:44 -0400 Received: from m12-12.163.com ([220.181.12.12]:50094 "EHLO m12-12.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231279AbhEUObm (ORCPT ); Fri, 21 May 2021 10:31:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Subject:From:Message-ID:Date:MIME-Version; bh=9E886 vx/OO/P//cwyNBUwq6A5knojODRU6jbrRSsoSk=; b=pnEgiCjLyv2zZWqwrV3Jp AqNcQmSIkD+oqE3Fyh/z3D5QK1pQ4Bn2Z3YKflNXo41YWUEI07lLlOfUhq/txgxT QBmia6A6NGrIxeULDlzuZNsGxvFbv4iQ2eodXRa2CzAgzrIkO4ww9CrWRiHz2a37 Vrd0PNhLCNS9hvPrJVF+rQ= Received: from [192.168.31.187] (unknown [36.170.35.140]) by smtp8 (Coremail) with SMTP id DMCowAB3p1vrw6dgrcOfFQ--.47192S2; Fri, 21 May 2021 22:30:05 +0800 (CST) Subject: Re: [PATCH] docs/zh_CN: Add zh_CN/admin-guide/lockup-watchdogs.rst To: teng sterling Cc: Alex Shi , Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Hailong Liu , Yanteng Si References: <20210513154425.93603-1-liuhailongg6@163.com> From: Hailong Liu Message-ID: <46dd6bb8-84bc-e28e-e463-95b5b6b68e2c@163.com> Date: Fri, 21 May 2021 22:30:03 +0800 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: 8bit X-CM-TRANSID: DMCowAB3p1vrw6dgrcOfFQ--.47192S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxGry3Aw4xtw1UGFW7AFW3trb_yoW5ZFW8pF ZxAa4fKw48J34kXa47J348WF1Yk34kJrW5Ga4ktryUJw1Ykrn5Aw4Utr45Waya9F4Syr4j qF1Ut34kJFyDJrJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jLXocUUUUU= X-Originating-IP: [36.170.35.140] X-CM-SenderInfo: xolxxtxlor0wjjw6il2tof0z/1tbi8A2ZYFuob4d6TQAAso Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/21/21 5:38 PM, teng sterling wrote: > CC siyanteng@loongson.cn > > BTW： > > I don't know why, but your email was treated as spam by gmail. I use > gmail email to subscribe to doc-list, so I didn't find it before, > maybe many people are like me. :-) > Oh, that's too bad. Unforunately I don't know this at all. I promise, I have never done anything to annoy gmail. :-) >> @@ -0,0 +1,65 @@ > refer to other Chinese translations, add maintainer information and > tags and original documentation links. > Alright, got it. >> +=============================================================== >> +Softlockup与hardlockup检测机制(又名:nmi_watchdog) >> +=============================================================== > the line is too long，align it with the text > Ok, I will try to fix it in 2nd version. >> +Softlockup是一种在内核持续循使用CPU超过20秒（详见下面“实现”小节） > origindoc: A ‘softlockup’ is defined as a bug that causes the kernel > to loop in kernel mode for more than 20 seconds > > It's not right for you to translate it that way. Although there are > not many cases where the kernel uses the cpu continuously for more > than 20s, it doesn't mean it doesn't exist, let alone conclude that it > will definitely panic. > > btw： > > bug：计算机领域专业术语，bug原意是“臭虫”，现在用来指代计算机上存在的漏洞，原因是系统安全策略上存在的缺陷，有攻击者能够在未授权的情况下访问的危害。 I have to admit that this paragraph is indeed not precise enough. >> +导致其他任务无法得到运行的内核问题。一旦检测到'softlockup'发生，默认 >> +情况下系统会打印当前堆栈跟踪信息并进入锁定状态。也可配置使其在检测到 >> +'softlockup'后进入panic状态；通过sysctl命令设置 >> +“kernel.softlockup_panic”、使用内核启动参数“softlockup_panic”（详见 >> +Documentation/admin-guide/kernel-parameters.rst）以及使能内核编译选项 >> +“BOOTPARAM_SOFTLOCKUP_PANIC”都可实现这种配置。 >> + >> +而'hardlockup'是内核中持续循环超过10秒钟（详见"实现"小节）导致其他中 > maybe 内核态？ You are right. "内核态" is more appropriate. >> +断无法运行的问题。与'softlockup'情况类似，除了使用sysctl命令设置 > 不给其他中断运行的机会 != 其他中断无法运行 Thanks for correcting! >> +Hrtimer用于周期性产生中断并唤醒watchdog任务；而NMI perf事件则以 >> +”watchdog_thresh“(编译时默认初始化为10秒，也可通过”watchdog_thresh“这 >> +个sysctl接口来进行配置修改)为间隔周期产生以检测 hardlockups。如果一个 >> +CPU在这个时间段内没有检测到hrtimer中断发生，'hardlockup 检测器'(即 >> +NMI perf事件处理函数)将会视系统配置而选择产生内核告警或者直接panic。 > 内核警告 Ok, got it. >> +如上所述,内核相当于为系统管理员提供了一个可调节hrtimer定时器和perf事件 >> +的周期长短的旋钮。对于特定的场景通过这个旋钮配置一个合理的周期值需要权 >> +衡lockups检测的响应速度和检测的开销。 >> + >> +默认情况下所有在线cpu上都会运行一个watchdog任务。不过在内核配置了 > maybe watchdog线程/进程？ > I prefer to choose "线程". I'm grateful to you for verifying my patch word by word, I will try to fix and optimize them in patch v2 later. Thanks, Hailong