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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 217E2C433F5 for ; Tue, 17 May 2022 11:53:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345506AbiEQLxs (ORCPT ); Tue, 17 May 2022 07:53:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230254AbiEQLxp (ORCPT ); Tue, 17 May 2022 07:53:45 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E01B432EE2 for ; Tue, 17 May 2022 04:53:43 -0700 (PDT) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 24HBJxPK009345; Tue, 17 May 2022 11:53:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : content-type : in-reply-to : mime-version; s=pp1; bh=7M/AUCM5LDndiMCVtoFCjZbAO3V6u+Lryd3PMq1ph9g=; b=Z17EwHjI4EQHfHrHIq7DOav7jIoRrA/eMGq6U5KcMa9LV4aFOSDTkjmhz7QVKsRnxDaU gn4CXSzsOrq51GWavQLTiV8w6aP8L5ulViRVfs6BF4KMw6sET+EW+Q7j0j38xrTIR0TY V7+FR05XogTIQNjLuyAqg2UtZMfKq4evMHmWrjeeC+mIedBzET3HIAWL8mHl/NWahnjI 16H5uGoNTVbKoaHungXtO6KuaPJUx4MFaKqb7Z++bRHLVZeSEFZOyHLm7GCJm/O4apEB CicabWlOPnogPjxaDGAHXXsHTpl35P9vG1HBgG4XoK7jWY/hbT5HvFkvQQlE3CTcRxjL nQ== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3g4ar78nq3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 May 2022 11:53:28 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 24HBqQG1026043; Tue, 17 May 2022 11:53:26 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma03ams.nl.ibm.com with ESMTP id 3g2429c59a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 May 2022 11:53:26 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 24HBrNb457737684 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 May 2022 11:53:24 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DF582A405C; Tue, 17 May 2022 11:53:23 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 96AA2A4054; Tue, 17 May 2022 11:53:23 +0000 (GMT) Received: from osiris (unknown [9.145.73.41]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 17 May 2022 11:53:23 +0000 (GMT) Date: Tue, 17 May 2022 13:53:22 +0200 From: Heiko Carstens To: Liam Howlett Cc: Sven Schnelle , Guenter Roeck , Andrew Morton , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] mapletree-vs-khugepaged Message-ID: References: <20220428172040.GA3623323@roeck-us.net> <20220513165955.mkg5wvfi4dwpzoer@revolver> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220513165955.mkg5wvfi4dwpzoer@revolver> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: -NdFa35NCeB_6brhUSOoTgn0ddyOZKaX X-Proofpoint-GUID: -NdFa35NCeB_6brhUSOoTgn0ddyOZKaX X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-17_02,2022-05-17_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 suspectscore=0 mlxscore=0 mlxlogscore=807 malwarescore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205170069 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 13, 2022 at 05:00:31PM +0000, Liam Howlett wrote: > * Sven Schnelle [220513 10:46]: > > Heiko Carstens writes: > > > FWIW, same on s390 - linux-next is completely broken. Note: I didn't > > > bisect, but given that the call trace, and even the failing address > > > match, I'm quite confident it is the same reason. > > IS that issue supposed to be fixed? git bisect pointed me to > > > > # bad: [76535d42eb53485775a8c54ea85725812b75543f] Merge branch > > 'mm-everything' of > > git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm > > > > which isn't really helpful. > > > > Anything we could help with debugging this? > > I tested the maple tree on top of the s390 as it was the same crash and > it was okay. I haven't tested the mm-everything branch though. Can you > test mm-unstable? > > I'll continue setting up a sparc VM for testing here and test > mm-everything on that and the s390 So due to reports here I did some sort of "special bisect": with today's linux-next I did a hard reset to commit 562340595cbb ("Merge branch 'for-next/kspp' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git"), started a bisect on Andrew's tree between mm-stable and mm-unstable, and merged whatever commit was about to be bisected into 562340595cbb. This lead finally to commit f1297d3a2cb7 ("mm/mmap: reorganize munmap to use maple states") as "first bad commit". So given that we are shortly before the merge window and linux-next is completely broken for s390, how do we proceed? Right now I have no idea if there is anything else in linux-next that would break s390 because of this. Even though I'm sure you won't like to hear this, but I'd appreciate if this code could be removed from linux-next again.