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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 81284C2D0DB for ; Mon, 27 Jan 2020 18:17:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 408CD214AF for ; Mon, 27 Jan 2020 18:17:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="VmkxZx7r" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726444AbgA0SRV (ORCPT ); Mon, 27 Jan 2020 13:17:21 -0500 Received: from mail-qt1-f193.google.com ([209.85.160.193]:35916 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725828AbgA0SRV (ORCPT ); Mon, 27 Jan 2020 13:17:21 -0500 Received: by mail-qt1-f193.google.com with SMTP id t13so7722858qto.3 for ; Mon, 27 Jan 2020 10:17:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=H0vXK67+oGRk9o9l8RLmztHaP5aIkeAR8XI0InnlAdw=; b=VmkxZx7rR4jyhk3oNN0A4XJ3rXz9icpoNz5NRQqSunNYTLzjySAkZditLPRjzsNx/z 0QtE+umERJcVZZv7JdGx3Ucx9aDG5kZAtt7csozqHZBjKkqMbUiCxSCMpmPqGuYWdGXP 6rA8e5L09NP2PjkfzBtDcbx3sVG+KwS3yw6FsWaRrIQ43qYFJLyy+kv2dWYkJlxzTiKG Q9/QfRAfLEAwbMvdLoc+dFrgrw+wX7snqTkF81Qa56TR2XVa69b3FZcyyly9aw0pZg+H GlrV4CRld2aR5IfXD6T2uKNgTQACWerD6ldeSPHYEC2fGcESHImD89zLpzGUbtfst2mc qWoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=H0vXK67+oGRk9o9l8RLmztHaP5aIkeAR8XI0InnlAdw=; b=KFPZBVWCJtjdz6GIncNUhF+1iCXzRx5G8T+QXHUbHib/gSyDr4R74fiXiRaKvnhovC FXfVGrPfhtw2TcAFwmbnb5E1/luzC19iCK2YAvH56dPCLybehWR0Kv3Yqh5cZGrietl6 03bywJTFIUFZ3JD4f9JlubPWuYafdgVxX0j4RpO6oBVoVmj+UIAVehA2oHwXbsVm/P9w 8/Pum5KYpmK00lCL4CykLDl+iQQJIEt3/rtCwd6fp4DKmihTNqaRQk+UkMXP6Fl0llBP oonh0uMVIyAqEcvLeyOlq6vaT1PeFwXEz/16dkZp7pEM9RzgEzm5edVb2A8xPllgumw6 KV8g== X-Gm-Message-State: APjAAAUhbpEJLui0PUAAU6Ksqx1BWcyRAcPp2JGYqnEp1m5Jl871FOd1 ZTQJMtMHBw+tNslEFG2sBnv5k5ZlqwtZbg== X-Google-Smtp-Source: APXvYqwefJtTiBmdzBaof1Ae/agBKz2BgRCUSBP1dePt3x+Aq3NQY7KIeICOMGBb6HN28GdJ1MvWLA== X-Received: by 2002:aed:3e53:: with SMTP id m19mr17288476qtf.387.1580149040133; Mon, 27 Jan 2020 10:17:20 -0800 (PST) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id o6sm9945160qkk.53.2020.01.27.10.17.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Jan 2020 10:17:19 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH] mm: mempolicy: use VM_BUG_ON_VMA in queue_pages_test_walk() Date: Mon, 27 Jan 2020 13:17:18 -0500 Message-Id: <1221B3C6-6A3B-4427-92DD-25AD54FF6BB5@lca.pw> References: <1579068565-110432-1-git-send-email-yang.shi@linux.alibaba.com> Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <1579068565-110432-1-git-send-email-yang.shi@linux.alibaba.com> To: Yang Shi X-Mailer: iPhone Mail (17C54) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Jan 15, 2020, at 1:09 AM, Yang Shi wrote: >=20 > The VM_BUG_ON() is already used by queue_pages_test_walk(), it sounds > better to dump more debug information by using VM_BUG_ON_VMA() to help > debugging. What=E2=80=99s the problem this is trying to resolve? Was there an existing b= ug would trigger this?=