Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp3783358ybl; Mon, 27 Jan 2020 10:19:30 -0800 (PST) X-Google-Smtp-Source: APXvYqzeDhyZV2icjSHIx1cgIGAJz7KZdOCNBXOpY0UHWD+IFpUwHozT5yGM4EVaiBXT78q3tOiq X-Received: by 2002:a9d:760d:: with SMTP id k13mr9834755otl.20.1580149169752; Mon, 27 Jan 2020 10:19:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1580149169; cv=none; d=google.com; s=arc-20160816; b=jF+MdEPBIfXq8RhcK/ycExMH5tecEgmuKUuHI3M3TAaOA1fLBCqFVmTYd0dhOwiqCw kqopXKC3KuO6AT4f7Do2dvaOs9R7iWMYaKS5OpqEtuZdiAW3ZB2PXlY3fSOZ+58YwElE H9ob3pg71hkeFdLZzsBxduO1Za4/kQ6dV1igGZEJvkleV0lnY07MAwl83EU9jtoztUY9 QXvsLAexzv+lu539+IgFC1cWn09nG9znmjbMZPtg9c2UGxN0R2fSPmWL4PyFgSLPxbsr QNAqmTTWjocu6omQPT68r/Ra3QpIZKGOhq3p/oFdKhtg+F6IlJv/Yl/yYBeJ7X5C4mJJ QSZA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:to:in-reply-to:cc:references:message-id :date:subject:mime-version:from:content-transfer-encoding :dkim-signature; bh=H0vXK67+oGRk9o9l8RLmztHaP5aIkeAR8XI0InnlAdw=; b=T8jvPLvvIblFwUaTva7OVKBCSDon1sz0pXGfXzpDpheapgvRAG9v7cbI7HAb8dj/tv qt2270kftKrd27JEABQ1JPJqpIzaR1isCZR6uAvT3yaYnQprUHzZ7k2jLVunzqpFPLfs UTFX1cxLD2QgPsv6pxeRGqBofPHMg8Ux+dgN0vakco74VLP/plrjSQrp/bih7xYOJPzC QE2tjBlzVcumJTNgzRR7qkqpbscN3X4X1xqc4oI3wh6d110r13oUQPkr7U+mKFzPyQl2 6lbct0OlfHiD2SNBu2VxhzMKleXaSgAcU62jRlk9bLkhYeY/gwib6dyxFaJixFiTHVNT TpyA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@lca.pw header.s=google header.b=VmkxZx7r; 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 a14si4152003oid.58.2020.01.27.10.19.18; Mon, 27 Jan 2020 10:19:29 -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=VmkxZx7r; 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 S1726323AbgA0SRV (ORCPT + 99 others); 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-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?=