Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3869780imu; Mon, 14 Jan 2019 10:27:44 -0800 (PST) X-Google-Smtp-Source: ALg8bN40wwlcDwhg+zIuYsjqTGMtJ33vbN+RtjajudvIyulg1R66jyRopoucTW+hWwpj2U1pmQVW X-Received: by 2002:a17:902:aa8c:: with SMTP id d12mr27088556plr.25.1547490464501; Mon, 14 Jan 2019 10:27:44 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1547490464; cv=none; d=google.com; s=arc-20160816; b=nSVmnyMbhixOFA3xbP5WVUBzAESxIEronbbsNMTHJgrWtYQyUODqiULsUG8FG2eLmC Eeue6xAW+TBDeG9fAyWpC9Ie0+NR0bvaFA0k/LxdII+wKlRZCiBjeFST7VEnOKtQ60jw PK0DwCZ5/3Vj9v4sMoounSiwZLQVzK+cgojP3XXmq0qB27kG5E9mHzovazY3ZCi4KPMr mPgHdQZ9Y9BkKEaEozaHxmBl2fyT+mXXRvO95ZzEInQVajiBp26OUXodvK9lu5ra2T54 02eaW+UxIVUYAgKOcAGMzVwhU/jBixtP10hBypNnAz6jWT50l+D5ugoBjuv603i5Bzei XNBg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject:reply-to; bh=mYn0wdwx1TOKH3dgnsIWktm6xf7XDyI6Jjvq4UWKVYE=; b=n9qrHwuzuovOjEftAbB7Mk3lM1yMasxmLuPuF6gYhArlfr9/qEZiA97mZV+ef4m4be +EOlgLHpo1WfWr1v4HpQT4l7gO44TcQmUp1MYU5e+vjhuIxQ7gu1JJEahjORwgmw2hOR U3VN8wUvAs4Iyd53lwJw/uSOQMRHSPmN9JSz4W5EWz/tXY1aX9O+TyUumHTLsO4uAYNZ aMgdMMcQMV42BIM/mEfAmhDf50u/1rrC6BeD0hV19k5/Y21fdNeNPwjMTSaZqx+y2BOv 7hMBxIufHkuX8nQ6B/QteaBYXWK6yJK1mH8r6gyeqw542vMii8fGmKjoQbDXvd89bCaf Unrw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z14si825502pga.349.2019.01.14.10.27.28; Mon, 14 Jan 2019 10:27:44 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726764AbfANS0V (ORCPT + 99 others); Mon, 14 Jan 2019 13:26:21 -0500 Received: from smtp.infotech.no ([82.134.31.41]:58790 "EHLO smtp.infotech.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726643AbfANS0U (ORCPT ); Mon, 14 Jan 2019 13:26:20 -0500 Received: from localhost (localhost [127.0.0.1]) by smtp.infotech.no (Postfix) with ESMTP id 563292041D4; Mon, 14 Jan 2019 19:26:18 +0100 (CET) X-Virus-Scanned: by amavisd-new-2.6.6 (20110518) (Debian) at infotech.no Received: from smtp.infotech.no ([127.0.0.1]) by localhost (smtp.infotech.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SFJEaAsa9cXk; Mon, 14 Jan 2019 19:26:16 +0100 (CET) Received: from [192.168.48.23] (host-192.252-161-233.dyn.295.ca [192.252.161.233]) by smtp.infotech.no (Postfix) with ESMTPA id 7F38920417C; Mon, 14 Jan 2019 19:26:14 +0100 (CET) Reply-To: dgilbert@interlog.com Subject: Re: [PATCH v2] rbtree: fix the red root To: Qian Cai , Esme Cc: David Lechner , Michel Lespinasse , Andrew Morton , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "joeypabalinas@gmail.com" , linux-mm , LKML References: <20190111181600.GJ6310@bombadil.infradead.org> <864d6b85-3336-4040-7c95-7d9615873777@lechnology.com> <8v11ZOLyufY7NLAHDFApGwXOO_wGjVHtsbw1eiZ__YvI9EZCDe_4FNmlp0E-39lnzGQHhHAczQ6Q6lQPzVU2V6krtkblM8IFwIXPHZCuqGE=@protonmail.ch> <5298bfcc-0cbc-01e8-85b2-087a380fd3fe@lca.pw> <51950f43-1daf-9192-ce9b-7a1ddae3edd2@lca.pw> From: Douglas Gilbert Message-ID: <1d749c95-542f-e65d-4f1b-41d905952d77@interlog.com> Date: Mon, 14 Jan 2019 13:26:13 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <51950f43-1daf-9192-ce9b-7a1ddae3edd2@lca.pw> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-CA Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019-01-14 12:58 p.m., Qian Cai wrote: > Unfortunately, I could not trigger any of those here both in a bare-metal and > virtual machines. All I triggered were hung tasks and soft-lockup due to fork bomb. > > The only other thing I can think of is to setup kdump to capture a vmcore when > either GPF or BUG() happens, and then share the vmcore somewhere, so I might > pork around to see where the memory corruption looks like. Another question that I forgot to ask, what type of device is /dev/sg0 ? On a prior occasion (KASAN, throw spaghetti ...) it was a SATA device and the problem was in libata. Doug Gilbert