From patchwork Wed Dec 26 13:14:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fengguang Wu X-Patchwork-Id: 10743133 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C33B691E for ; Wed, 26 Dec 2018 13:38:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B23CE204BF for ; Wed, 26 Dec 2018 13:38:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A62D227BA5; Wed, 26 Dec 2018 13:38:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4749A204BF for ; Wed, 26 Dec 2018 13:38:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727207AbeLZNi0 (ORCPT ); Wed, 26 Dec 2018 08:38:26 -0500 Received: from mga06.intel.com ([134.134.136.31]:21292 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726937AbeLZNhH (ORCPT ); Wed, 26 Dec 2018 08:37:07 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Dec 2018 05:37:06 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,400,1539673200"; d="scan'208";a="113358939" Received: from wangdan1-mobl1.ccr.corp.intel.com (HELO wfg-t570.sh.intel.com) ([10.254.210.154]) by orsmga003.jf.intel.com with ESMTP; 26 Dec 2018 05:37:01 -0800 Received: from wfg by wfg-t570.sh.intel.com with local (Exim 4.89) (envelope-from ) id 1gc9Mr-0005Ns-5X; Wed, 26 Dec 2018 21:37:01 +0800 Message-Id: <20181226131446.330864849@intel.com> User-Agent: quilt/0.65 Date: Wed, 26 Dec 2018 21:14:46 +0800 From: Fengguang Wu To: Andrew Morton cc: Linux Memory Management List cc: kvm@vger.kernel.org Cc: LKML cc: Fan Du cc: Yao Yuan cc: Peng Dong cc: Huang Ying CC: Liu Jingqi cc: Dong Eddie cc: Dave Hansen cc: Zhang Yi cc: Dan Williams cc: Fengguang Wu Subject: [RFC][PATCH v2 00/21] PMEM NUMA node and hotness accounting/migration Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This is an attempt to use NVDIMM/PMEM as volatile NUMA memory that's transparent to normal applications and virtual machines. The code is still in active development. It's provided for early design review. Key functionalities: 1) create and describe PMEM NUMA node for NVDIMM memory 2) dumb /proc/PID/idle_pages interface, for user space driven hot page accounting 3) passive kernel cold page migration in page reclaim path 4) improved move_pages() for active user space hot/cold page migration (1) is foundation for transparent usage of NVDIMM for normal apps and virtual machines. (2-4) enable auto placing hot pages in DRAM for better performance. A user space migration daemon is being built based on this kernel patchset to make the full vertical solution. Base kernel is v4.20 . The patches are not suitable for upstreaming in near future -- some are quick hacks, some others need more works. However they are complete enough to demo the necessary kernel changes for the proposed app&VM transparent NVDIMM volatile use model. The interfaces are far from finalized. They kind of illustrate what would be necessary for creating a user space driven solution. The exact forms will ask for more thoughts and inputs. We may adopt HMAT based solution for NUMA node related interface when they are ready. The /proc/PID/idle_pages interface is standalone but non-trivial. Before upstreaming some day, it's expected to take long time to collect various real use cases and feedbacks, so as to refine and stabilize the format. Create PMEM numa node [PATCH 01/21] e820: cheat PMEM as DRAM Mark numa node as DRAM/PMEM [PATCH 02/21] acpi/numa: memorize NUMA node type from SRAT table [PATCH 03/21] x86/numa_emulation: fix fake NUMA in uniform case [PATCH 04/21] x86/numa_emulation: pass numa node type to fake nodes [PATCH 05/21] mmzone: new pgdat flags for DRAM and PMEM [PATCH 06/21] x86,numa: update numa node type [PATCH 07/21] mm: export node type {pmem|dram} under /sys/bus/node Point neighbor DRAM/PMEM to each other [PATCH 08/21] mm: introduce and export pgdat peer_node [PATCH 09/21] mm: avoid duplicate peer target node Standalone zonelist for DRAM and PMEM nodes [PATCH 10/21] mm: build separate zonelist for PMEM and DRAM node Keep page table pages in DRAM [PATCH 11/21] kvm: allocate page table pages from DRAM [PATCH 12/21] x86/pgtable: allocate page table pages from DRAM /proc/PID/idle_pages interface for virtual machine and normal tasks [PATCH 13/21] x86/pgtable: dont check PMD accessed bit [PATCH 14/21] kvm: register in mm_struct [PATCH 15/21] ept-idle: EPT walk for virtual machine [PATCH 16/21] mm-idle: mm_walk for normal task [PATCH 17/21] proc: introduce /proc/PID/idle_pages [PATCH 18/21] kvm-ept-idle: enable module Mark hot pages [PATCH 19/21] mm/migrate.c: add move_pages(MPOL_MF_SW_YOUNG) flag Kernel DRAM=>PMEM migration [PATCH 20/21] mm/vmscan.c: migrate anon DRAM pages to PMEM node [PATCH 21/21] mm/vmscan.c: shrink anon list if can migrate to PMEM arch/x86/include/asm/numa.h | 2 arch/x86/include/asm/pgalloc.h | 10 arch/x86/include/asm/pgtable.h | 3 arch/x86/kernel/e820.c | 3 arch/x86/kvm/Kconfig | 11 arch/x86/kvm/Makefile | 4 arch/x86/kvm/ept_idle.c | 841 +++++++++++++++++++++++++++++++ arch/x86/kvm/ept_idle.h | 116 ++++ arch/x86/kvm/mmu.c | 12 arch/x86/mm/numa.c | 3 arch/x86/mm/numa_emulation.c | 30 + arch/x86/mm/pgtable.c | 22 drivers/acpi/numa.c | 5 drivers/base/node.c | 21 fs/proc/base.c | 2 fs/proc/internal.h | 1 fs/proc/task_mmu.c | 54 + include/linux/mm_types.h | 11 include/linux/mmzone.h | 38 + mm/mempolicy.c | 14 mm/migrate.c | 13 mm/page_alloc.c | 77 ++ mm/pagewalk.c | 1 mm/vmscan.c | 38 + virt/kvm/kvm_main.c | 3 25 files changed, 1306 insertions(+), 29 deletions(-) V1 patches: https://lkml.org/lkml/2018/9/2/13 Regards, Fengguang Signed-off-by: Liu Jingqi Signed-off-by: Fengguang Wu