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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BD35C07CA9 for ; Tue, 28 Nov 2023 11:03:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AE4606B0288; Tue, 28 Nov 2023 06:03:56 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A477D6B029F; Tue, 28 Nov 2023 06:03:56 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8992B6B02A1; Tue, 28 Nov 2023 06:03:56 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 799F16B0288 for ; Tue, 28 Nov 2023 06:03:56 -0500 (EST) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 500E91601A2 for ; Tue, 28 Nov 2023 11:03:56 +0000 (UTC) X-FDA: 81507078072.14.128B3F6 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf25.hostedemail.com (Postfix) with ESMTP id 1D0D9A001D for ; Tue, 28 Nov 2023 11:03:53 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b="iJE+ri/N"; spf=pass (imf25.hostedemail.com: domain of sumanthk@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=sumanthk@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1701169434; a=rsa-sha256; cv=none; b=ikmVVIwYgLqKsYpm14I+By8gxuXxhBVfi2VwvCRAJ7INu6NS2kZG4f3kCTJChHcnlqtqv9 zHAbMm2hEVjyqrnaKkqeM8bFO7xfoHz/91cYt2GAR8zZ2HK7li6C0BbV93Ipsq2kofexJP Ww/2nddrv4aqRP7s9ZMrhuph8FvnCxQ= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b="iJE+ri/N"; spf=pass (imf25.hostedemail.com: domain of sumanthk@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=sumanthk@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1701169434; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=NQD5vamojNYAOy6f1K01j8XrHQ5a42dos52ZE8qgM1Y=; b=lpZIdEBwJ1MbDpesieeImcg7zVVg735Zqq/1CPZ6IujrVIz7oSAZCk704QQBYmYMfMQU6e B3X+eEui7GVqpL2qfZjtRzOeRa2lZQDbOFQTlRMmGSmsRXkGipFYQpkECvNY1SDs8EQ3R+ zTQ3VhgODjvboOf2eqpSIn1TCwuocAc= Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ASB26b7025942; Tue, 28 Nov 2023 11:03:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=NQD5vamojNYAOy6f1K01j8XrHQ5a42dos52ZE8qgM1Y=; b=iJE+ri/N+4H2FjMtF0jCEMP4DcEle6s10y8KgsTFmZMm/766SWV6CthWdMU8pra/HIMK AQD9tTa0uzPKV9G4Ovt8kqKZFfHM488+qXrht+J3bbbs56KPew1k6fiDLmF3U2elEu3n 4x7abuzwk2Me/TKD4610ESb5OleDMxHuNYmqW7GnjzDwS6PK//XSd1lIE6xFUn6RJs6V A98qV1vUHF0imBg5e4jgeZeTBHzGLLHeedswbfv8HRBLqMU00E2W14gup0ssyZDRLl9r clPFsjGt34yYoXKCmFxhroCytIJN6WcCTN7CEWtLWypATII4WKeWNuBx5xmekIcHZ84o Pw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uneyp8182-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 28 Nov 2023 11:03:50 +0000 Received: from m0353729.ppops.net (m0353729.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ASB2enC027143; Tue, 28 Nov 2023 11:03:50 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uneyp8174-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 28 Nov 2023 11:03:49 +0000 Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ASAWIhQ027647; Tue, 28 Nov 2023 11:03:48 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3ukumyfc00-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 28 Nov 2023 11:03:48 +0000 Received: from smtpav03.fra02v.mail.ibm.com (smtpav03.fra02v.mail.ibm.com [10.20.54.102]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3ASB3iuV20185732 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 28 Nov 2023 11:03:45 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B79AA20043; Tue, 28 Nov 2023 11:03:44 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6813020040; Tue, 28 Nov 2023 11:03:44 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 28 Nov 2023 11:03:44 +0000 (GMT) From: Sumanth Korikkar To: linux-mm , Andrew Morton , David Hildenbrand Cc: Oscar Salvador , Michal Hocko , "Aneesh Kumar K.V" , Anshuman Khandual , Gerald Schaefer , Alexander Gordeev , Heiko Carstens , Vasily Gorbik , linux-s390 , LKML Subject: [PATCH v4 0/5] implement "memmap on memory" feature on s390 Date: Tue, 28 Nov 2023 12:03:37 +0100 Message-Id: <20231128110342.102096-1-sumanthk@linux.ibm.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Xx4GJybYKPXV9-pMcRk3RoptDOuwCCc8 X-Proofpoint-GUID: e4ABum7uHinNJhNtvd3t-tsCqrLkA53J X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-28_10,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=1 mlxlogscore=194 impostorscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 mlxscore=1 spamscore=1 adultscore=0 clxscore=1015 suspectscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311280087 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 1D0D9A001D X-Stat-Signature: zwsq4np56z3qd8wt3wpo6skhbyjmkf6x X-Rspam-User: X-HE-Tag: 1701169433-813425 X-HE-Meta: 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 e1Yk47/h 3cWCWZCFysLnRKIzScjWfpILGHPvymEh6hYlOTmAiOfaWJ6+zwm1Ktqszx1LokSPZ2C7roz+UoLPG39e2KBA9LW1K6FlbYFjAe3xzNJxG/1l4HEE35954TrbDbA== 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: List-Subscribe: List-Unsubscribe: Hi All, The patch series implements "memmap on memory" feature on s390. Patch 1 introduces MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE memory notifiers to prepare the transition of memory to and from a physically accessible state. New mhp_flag MHP_OFFLINE_INACCESSIBLE is introduced to ensure altmap cannot be written when addidng memory - before it is set online. This enhancement is crucial for implementing the "memmap on memory" feature for s390 in a subsequent patch. Patches 2 allocates vmemmap pages from self-contained memory range for s390. It allocates memory map (struct pages array) from the hotplugged memory range, rather than using system memory by passing altmap to vmemmap functions. Patch 3 removes unhandled memory notifier types on s390. Patch 4 implements MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE memory notifiers on s390. MEM_PREPARE_ONLINE memory notifier makes memory block physical accessible via sclp assign command. The notifier ensures self-contained memory maps are accessible and hence enabling the "memmap on memory" on s390. MEM_FINISH_OFFLINE memory notifier shifts the memory block to an inaccessible state via sclp unassign command Patch 5 finally enables MHP_MEMMAP_ON_MEMORY on s390 Note: These patches are rebased on top of three fixes: mm: use vmem_altmap code without CONFIG_ZONE_DEVICE mm/memory_hotplug: fix error handling in add_memory_resource() mm/memory_hotplug: add missing mem_hotplug_lock v4: * Introduced two new fields, altmap_start_pfn and altmap_nr_pages, in the memory_notify structure and document it that it is used only in MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE callbacks. * Incorporated the newly added fields into s390's MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifier callbacks. * Prevent access to memblock->altmap->free in the s390 notifier callback. * page_init_poison() could be performed similar to when adding new memory in sparse_add_section(). Perform it without cond_resched(). v3: * added comments to MHP_OFFLINE_ACCESSIBLE as suggested by David. * Squashed three commits related to new memory notifier. v2: * Fixes are integrated and hence removed from this patch series Suggestions from David: * Add new flag MHP_OFFLINE_INACCESSIBLE to avoid accessing memory during memory hotplug addition phase. * Avoid page_init_poison() on memmap during mhp addition phase, when MHP_OFFLINE_INACCESSIBLE mhp_flag is passed in add_memory(). * Do not skip add_pages() in arch_add_memory(). Similarly, remove similar hacks in arch_remove_memory(). * Use MHP_PREPARE_ONLINE/MHP_FINISH_OFFLINE naming convention for new memory notifiers. * Rearrange removal of unused s390 memory notifier. * Necessary commit messages changes. Thank you Sumanth Korikkar (5): mm/memory_hotplug: introduce MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers s390/mm: allocate vmemmap pages from self-contained memory range s390/sclp: remove unhandled memory notifier type s390/mm: implement MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers s390: enable MHP_MEMMAP_ON_MEMORY arch/s390/Kconfig | 1 + arch/s390/mm/init.c | 3 -- arch/s390/mm/vmem.c | 62 +++++++++++++++++++--------------- drivers/base/memory.c | 23 ++++++++++++- drivers/s390/char/sclp_cmd.c | 50 ++++++++++++++++++++++----- include/linux/memory.h | 9 +++++ include/linux/memory_hotplug.h | 18 +++++++++- include/linux/memremap.h | 1 + mm/memory_hotplug.c | 13 ++++++- mm/sparse.c | 3 +- 10 files changed, 140 insertions(+), 43 deletions(-) -- 2.41.0