Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3842424imu; Mon, 14 Jan 2019 09:59:32 -0800 (PST) X-Google-Smtp-Source: ALg8bN78/LPbstYw3toAGrfsKs87zWlnxpdI8EasyaWzhdv6qoxI6N9XbboYhwZgn48VT/tRlO7d X-Received: by 2002:a63:6ecf:: with SMTP id j198mr24361976pgc.3.1547488771930; Mon, 14 Jan 2019 09:59:31 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1547488771; cv=none; d=google.com; s=arc-20160816; b=Usm37pA1nMXXxEyzy8IOcNDc6BcRzz4f4H6EAbzQsaR5GGmG4JYCcGwbedPu1hjyK3 eUBw0uuNp53qwLZN1jcF05CH9coavQPJStB59yuxDvRqLQzlZ7fgnndNbKQjTxdW7uqL oCXl3MOL0DWeaZaV6m/EEGOuEES/e4rFYaHQROTexb7zcGgnOAe1c6Z7aYqzzBJU+c5X kn1/z+/fbssXPC9EtfnR2C3UFxo7PF+F/MtDNKyS/jdCEsZR3A9ufZFqRS6bLBJ1cRak AKlG21CvnbPxTFhkGxuu8mZyoYxcgpo3WMQc2O+K/2NEJdafniY1pD+mBzmT5UmJvAx+ 2V9w== 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:dkim-signature; bh=tJ9fNvZaZwlEFd3E1QXRFZoKFDeQNfO8s60LHEBjPEQ=; b=LCn98lFoYJLLqFqtT+97ZwSi8c+l8C0vBLifp+hhVIVV0fpXYtBZzzHuxIqxjhzfnW Id1bkPDu7/vGnriEz/TozFIRcJ4J9327WYAq52slx6rbHbfmFc2isaqvJgjns3T/LyS2 BSUgY3aylBuNV0eWFQr+Ul4WYiByYKY9Hi4MvoAZ1SbRNrMZlkdat0594yarZcZkCLDN LEj16jhe7/g4UgnRW+5PPbETVgxtqmu9AUHLXgb1Cmh1HBgAj4/fJuB3tPlog3bhDh7u YneTNMuDkaOc7igm3DImXKKKZ8cNntlbVt2bKi9pcmtIOAGECaGb72BLYhaHOOI01aw4 x4Cg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@lca.pw header.s=google header.b=KQ0rxsMZ; 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 r28si767682pgm.317.2019.01.14.09.59.15; Mon, 14 Jan 2019 09:59:31 -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; dkim=pass header.i=@lca.pw header.s=google header.b=KQ0rxsMZ; 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 S1726751AbfANR6H (ORCPT + 99 others); Mon, 14 Jan 2019 12:58:07 -0500 Received: from mail-qk1-f195.google.com ([209.85.222.195]:43465 "EHLO mail-qk1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726708AbfANR6H (ORCPT ); Mon, 14 Jan 2019 12:58:07 -0500 Received: by mail-qk1-f195.google.com with SMTP id z18so11054730qkj.10 for ; Mon, 14 Jan 2019 09:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=tJ9fNvZaZwlEFd3E1QXRFZoKFDeQNfO8s60LHEBjPEQ=; b=KQ0rxsMZAEsuVT6T5ptEyJAZRBFkiRnDxOx2BRJ9aPbjCoypBVubc8kCfwTIRKPwu0 yD67hp62PgvRMQWXTiTBubzMfMBnkDxoBZS4ryrJ7u3QZXorksiJVxww9AV5qjG8My05 dm5Ix9HzYseY4RO6SmearrYl0+0FX4EfTOG6zoMU95m07EeSRgMgP9kSZjCGy8qJMdSc gk8D9L+fwJYrQbIzUvQsHEsc6fHr79yJQIXcY1oyRb8xVHtQsxr5UchARuJl7Zwm+/dl FNyA43cSxMXAjv0t5faOpYl6xng7MImeWbbaWZiLx909jGPbIjBlD0aS3mEeYLJz9mLJ hY4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=tJ9fNvZaZwlEFd3E1QXRFZoKFDeQNfO8s60LHEBjPEQ=; b=ae0BKxcpirsN0RGJsD7Hw6zaBo822ib7ozqmCsBlCWuSPgMy53rTLyN0NIIEdKVwH3 sF483VjnDchT+PxQibp5HCsvVtsk2ZvxEOZn+n/JR8UBs8CelzfPeHBe62+yxNtLoLRv UHcsWP+9WfHE9LxKKmsnAzQh/s9ZuyAAtO0ib7BGpMCv/RUgdbHopvcoiHRYYwPWEQK6 giPtqwH7Juelz/Eh01MuaEDSV/nHnRcMaS1pYMP8voiMBCe/55u4BF+8eTUfjFNIjDhM Sy+tH+faeB8yj5I4BUzxpyags69MOcCRPYlLXFpOL9ZcgQmsbxAabhfWI/yZVxlxPjiu vVmw== X-Gm-Message-State: AJcUukcbs6tmVraLIAoATrGIs5Opau33owgEcDmoiE2b8kzqu77n76vG z0wH0dtW0vx+O6Vg3jVjjqGCrOcVT9+oVQ== X-Received: by 2002:a37:8b84:: with SMTP id n126mr22094704qkd.355.1547488685769; Mon, 14 Jan 2019 09:58:05 -0800 (PST) Received: from ovpn-120-55.rdu2.redhat.com (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id y68sm17019222qkd.49.2019.01.14.09.58.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 14 Jan 2019 09:58:05 -0800 (PST) Subject: Re: [PATCH v2] rbtree: fix the red root To: Esme Cc: "dgilbert@interlog.com" , 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> From: Qian Cai Message-ID: <51950f43-1daf-9192-ce9b-7a1ddae3edd2@lca.pw> Date: Mon, 14 Jan 2019 12:58:03 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 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 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.