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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 6A4C9C388F7 for ; Wed, 4 Nov 2020 12:14:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E01222236F for ; Wed, 4 Nov 2020 12:14:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E01222236F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 42EB16B0036; Wed, 4 Nov 2020 07:14:15 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3E1446B005D; Wed, 4 Nov 2020 07:14:15 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 320606B0068; Wed, 4 Nov 2020 07:14:15 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0123.hostedemail.com [216.40.44.123]) by kanga.kvack.org (Postfix) with ESMTP id 065C86B0036 for ; Wed, 4 Nov 2020 07:14:14 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 964188249980 for ; Wed, 4 Nov 2020 12:14:14 +0000 (UTC) X-FDA: 77446628028.17.hand84_3600207272c1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin17.hostedemail.com (Postfix) with ESMTP id 73AF0180D0181 for ; Wed, 4 Nov 2020 12:14:14 +0000 (UTC) X-HE-Tag: hand84_3600207272c1 X-Filterd-Recvd-Size: 2908 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf03.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Nov 2020 12:14:13 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id A28B7AC1D; Wed, 4 Nov 2020 12:14:12 +0000 (UTC) Subject: Re: [Bug 210031] New: unable to handle page fault for address - EIP: khugepaged To: Andrew Morton , newsmails@netcourrier.com Cc: bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org, Song Liu , "Kirill A. Shutemov" , Johannes Weiner , Oleg Nesterov References: <20201103161753.27a58af99ba35b94660e8fa3@linux-foundation.org> From: Vlastimil Babka Message-ID: <86e33bed-eb81-3966-b195-431742f86746@suse.cz> Date: Wed, 4 Nov 2020 13:14:12 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201103161753.27a58af99ba35b94660e8fa3@linux-foundation.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit 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: On 11/4/20 1:17 AM, Andrew Morton wrote: > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > > On Tue, 03 Nov 2020 20:00:58 +0000 bugzilla-daemon@bugzilla.kernel.org wrote: > >> https://bugzilla.kernel.org/show_bug.cgi?id=210031 >> >> Bug ID: 210031 >> Summary: unable to handle page fault for address - EIP: >> khugepaged >> Product: Memory Management >> Version: 2.5 >> Kernel Version: 5.9.1 >> Hardware: All >> OS: Linux >> Tree: Mainline >> Status: NEW >> Severity: normal >> Priority: P1 >> Component: Other >> Assignee: akpm@linux-foundation.org >> Reporter: newsmails@netcourrier.com >> Regression: No > > Thanks. That's a strange looking trace. I'll optimistically cc some > people who have been working in that area lately. > > What caused this kernel to be tainted? > > >> laptop Skylake i915 >> Distribution : slackware 14.2 32 bits >> >> Oct 23 17:38:22 linuxp kernel: [141330.499234] BUG: unable to handle page fault >> for address: 021d202d >> Oct 23 17:38:22 linuxp kernel: [141330.499245] #PF: supervisor read access in >> kernel mode >> Oct 23 17:38:22 linuxp kernel: [141330.499250] #PF: error_code(0x0000) - >> not-present page >> Oct 23 17:38:22 linuxp kernel: [141330.499265] Oops: 0000 [#2] SMP PTI #2 means this is not the first oops. Do you have the very first?