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[141.146.126.79]) by mx.google.com with ESMTPS id k20si15396706pfk.55.2019.03.26.06.52.16 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 06:52:16 -0700 (PDT) Received-SPF: pass (google.com: domain of william.kucharski@oracle.com designates 141.146.126.79 as permitted sender) client-ip=141.146.126.79; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2018-07-02 header.b=ipxJtVHV; spf=pass (google.com: domain of william.kucharski@oracle.com designates 141.146.126.79 as permitted sender) smtp.mailfrom=william.kucharski@oracle.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x2QDheMM025966; Tue, 26 Mar 2019 13:52:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2018-07-02; bh=hlceh8J3UDHjopzvH0T6OmT5CXF+sN3ZUycoWQT6P2o=; b=ipxJtVHVa8TePkRxY9VPWO/oNkzjmPCNqh9NxijVEQsVYVq8MvQbS929Nj8+8NnAadQw tPT77xcbL4bJS3Tf4+RSCiT3LctyrFNwAdRvlz/s/q5DHrypZiTw8DtpnFiiErGMA/iZ hDy8EfbmGt/Q8j0NHc4RVqRz+HRSc0I0OWEZB5LJYv/vCJbcYxAjGJ/Cb+O9alEl47SB MwjzN6G1Ey/Ys6n+W2iMIDFfJYcElDTTepuboG3TOmxAq7CTO56k6F+lnenLlv03Q0Yd cWDmHI7OsGZlnwXGfl/uPJGwrzOVZOZKKy8g90bg4BQ6jKQsJ7ePXrNHqly3Ir/Gs5a+ kg== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2130.oracle.com with ESMTP id 2re6g0tgbu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Mar 2019 13:52:12 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x2QDqBpC027245 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Mar 2019 13:52:11 GMT Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x2QDq9e2020614; Tue, 26 Mar 2019 13:52:09 GMT Received: from [192.168.0.110] (/73.243.10.6) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 26 Mar 2019 06:52:08 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.8\)) Subject: Re: CONFIG_DEBUG_VIRTUAL breaks boot on x86-32 From: William Kucharski In-Reply-To: <4d5ee3b0-6d47-a8df-a6b3-54b0fba66ed7@linux.ee> Date: Tue, 26 Mar 2019 07:52:07 -0600 Cc: LKML , linux-mm@kvack.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <4d5ee3b0-6d47-a8df-a6b3-54b0fba66ed7@linux.ee> To: Meelis Roos X-Mailer: Apple Mail (2.3445.104.8) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9206 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=991 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1903260097 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Does this still happen on 5.1-rc2? Do you have idea as to what max_low_pfn() gets set to on your system at = boot time? =46rom the screen shot I'm guessing it MIGHT be 0x373fe, but it's hard = to know for sure. > On Mar 21, 2019, at 2:22 PM, Meelis Roos wrote: >=20 > I tried to debug another problem and turned on most debug options for = memory. > The resulting kernel failed to boot. >=20 > Bisecting the configurations led to CONFIG_DEBUG_VIRTUAL - if I turned = it on > in addition to some other debug options, the machine crashed with >=20 > kernel BUG at arch/x86/mm/physaddr.c:79! >=20 > Screenshot at http://kodu.ut.ee/~mroos/debug_virtual-boot-hang-1.jpg >=20 > The machine was Athlon XP with VIA KT600 chipset and 2G RAM. >=20 > --=20 > Meelis Roos >=20