Received: by 2002:a05:6358:489b:b0:bb:da1:e618 with SMTP id x27csp8042591rwn; Wed, 14 Sep 2022 08:09:10 -0700 (PDT) X-Google-Smtp-Source: AA6agR7r7A6LCc9mvMUENcSgldUiLEwEeL9VXAdFIrjvyNVFg42u9emBfEiqlMOzQeO0O/kdOOr2 X-Received: by 2002:a05:6402:5ca:b0:43b:6e01:482c with SMTP id n10-20020a05640205ca00b0043b6e01482cmr31764488edx.189.1663168150238; Wed, 14 Sep 2022 08:09:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1663168150; cv=none; d=google.com; s=arc-20160816; b=ukbdjVQAi0OksjAZUMJOqRH/PD9hZq1/879a8NqebKypkkRC5jl2/LpbFi7xVeegET WJfvZ3tBrQZ3CWo0t+PYfdQ/dWJgSDAcZG5ZkAxdRpDCfEtFCmu0zFp+FWpCaD/+Cgca oa9/zIPgE7nDoLy+isYFBwzqVJ42wNCCbCrNy8ukhBwumP3VAMpZBKN85d1wkYn/GMtB fHOP8YRjQPMYu9NUUWZSI40ZV6mLshyoxi9D0BkDlcx3f5rEy10Tlb5s6anllLzTOnkh qnC5/uj8y5d3Us+SviqZBJ1G0bbB6uSXIX3nrpVHHNpJeE02ihC2TVS+1B7Cvfrc9lNi HplA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=dNdHgvByoy2R+oMT244sGz8QvNkoVUAwpFu6lpD/Iak=; b=WnGv1fLBSB04rWDVUi4PnQx5rtuxby2JHWAfwhIH/44Pmic3ERmADsdZgLsRHyFicU MekmLihZ/q8iv6MQbEb5cfGNMGDo3slGrfwsIz7Z8NgaDWyvxbq5n2kVVLVv7NGOxwLg mnDvS83IqXFrrc07lXz8SnzujTtuTtJxtPFJU2bOBr791wfnJtbry5DuxX2X2qNVISU2 kOL33GfEKVFNIS1MArwHpTzLBhYv6DIeLqUa3aUstcoMqfha1az11f91hTah3yhuw43M 3hKQn43ROcPp3NZ4TFu7xizu3gqoHptBhQKHVK6RUKa6i2UuYBo4JWg2GQWhfcYHDK3e wC4Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=I4ELJcTT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id wz1-20020a170906fe4100b0077f6158823fsi6181756ejb.533.2022.09.14.08.08.43; Wed, 14 Sep 2022 08:09:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=I4ELJcTT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230029AbiINPDS (ORCPT + 99 others); Wed, 14 Sep 2022 11:03:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229787AbiINPDO (ORCPT ); Wed, 14 Sep 2022 11:03:14 -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 14B427434A for ; Wed, 14 Sep 2022 08:03:14 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id x1-20020a17090ab00100b001fda21bbc90so19278840pjq.3 for ; Wed, 14 Sep 2022 08:03:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date; bh=dNdHgvByoy2R+oMT244sGz8QvNkoVUAwpFu6lpD/Iak=; b=I4ELJcTTd06NrEbZrhH5WVbadbXewHKCGVFua9Afi1o8daU92UseHKzKTC9EnyEhWb evntJuwVSCQUX2gddlTDQ7dDZFJdkm8jrVewoHk8PF2tPoH9RTCqPSHBe8Qal6iGRwbA RtkY5uZcuINL3hF33GVNvzgYq4JNEH9fcyhS8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date; bh=dNdHgvByoy2R+oMT244sGz8QvNkoVUAwpFu6lpD/Iak=; b=t7ix37fEZVHJpVONpExcVawtAcHraf1ROzi31iM7kZ0O/iyoyGhHg4PvsMMlxb2zaj owHkPdY31WphQTnbHq5+a7CJzykI3b+z2GnrkbFNOfCFolakUuAQ1gcCGBc3dcSn3C94 T8zp2BMSETWCLaYTotNm2sw2/86Lzo7m91ha1GVzFef9T8VbCOEk4XE2NOXKVDWiO/hg FW9zbmCHRf0n8lhjmIVLuc+CGweX6pCne7DoXSMjzYXL4RgXiMm/mt/zcSGGit3xz7l2 NQ+BLQRPTlLHfYC0roSD4hDDFwHjLGNNDtOBC+JlN9cp9m5k4Dkc+gfyacEe/J4gqrtw fHgA== X-Gm-Message-State: ACrzQf3IP+LILqU39AalnaNtTpt8uRZBLQ1bdnCPAqDLgh7Pp1GZeDCz dlCNTeBQrCwC2oYf6ILBbdG/Cw== X-Received: by 2002:a17:90b:19ce:b0:203:182d:2c77 with SMTP id nm14-20020a17090b19ce00b00203182d2c77mr3993582pjb.45.1663167793507; Wed, 14 Sep 2022 08:03:13 -0700 (PDT) Received: from google.com ([240f:75:7537:3187:8201:ef09:d097:37b8]) by smtp.gmail.com with ESMTPSA id u6-20020a170902714600b0017837d30a8csm6596592plm.254.2022.09.14.08.03.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Sep 2022 08:03:12 -0700 (PDT) Date: Thu, 15 Sep 2022 00:03:07 +0900 From: Sergey Senozhatsky To: Thomas Gleixner Cc: LKML , John Ogness , Petr Mladek , Sergey Senozhatsky , Steven Rostedt , Linus Torvalds , Peter Zijlstra , "Paul E. McKenney" , Daniel Vetter , Greg Kroah-Hartman , Helge Deller , Jason Wessel , Daniel Thompson Subject: Re: [patch RFC 10/29] kgbd: Pretend that console list walk is safe Message-ID: References: <20220910221947.171557773@linutronix.de> <20220910222300.966724916@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220910222300.966724916@linutronix.de> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (22/09/11 00:27), Thomas Gleixner wrote: > Provide a special list iterator macro for KGDB to allow unprotected list > walks and add a few comments to explain the hope based approach. > > Preperatory change for changing the console list to hlist and adding > lockdep asserts to regular list walks. > > Signed-off-by: Thomas Gleixner Reviewed-by: Sergey Senozhatsky [..] > - for_each_console(c) { > + /* > + * This is a completely unprotected list walk designed by the > + * wishful thinking departement. See the oops_inprogress comment s/oops_inprogress/oops_in_progress/