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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 C6E0CC46475 for ; Tue, 23 Oct 2018 13:02:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 85A972075D for ; Tue, 23 Oct 2018 13:02:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85A972075D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728002AbeJWVZi (ORCPT ); Tue, 23 Oct 2018 17:25:38 -0400 Received: from foss.arm.com ([217.140.101.70]:58856 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726277AbeJWVZi (ORCPT ); Tue, 23 Oct 2018 17:25:38 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 29B6580D; Tue, 23 Oct 2018 06:02:15 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.1.17]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4E1E03F6A8; Tue, 23 Oct 2018 06:02:08 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: suzuki.poulose@arm.com, punit.agrawal@arm.com, will.deacon@arm.com, Steven.Price@arm.com, steve.capper@arm.com, catalin.marinas@arm.com, mhocko@kernel.org, akpm@linux-foundation.org, mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com Subject: [PATCH V3 0/5] arm64/mm: Enable HugeTLB migration Date: Tue, 23 Oct 2018 18:31:56 +0530 Message-Id: <1540299721-26484-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series enables HugeTLB migration support for all supported huge page sizes at all levels including contiguous bit implementation. Following HugeTLB migration support matrix has been enabled with this patch series. All permutations have been tested except for the 16GB. CONT PTE PMD CONT PMD PUD -------- --- -------- --- 4K: 64K 2M 32M 1G 16K: 2M 32M 1G 64K: 2M 512M 16G First the series adds migration support for PUD based huge pages. It then adds a platform specific hook to query an architecture if a given huge page size is supported for migration while also providing a default fallback option preserving the existing semantics which just checks for (PMD|PUD|PGDIR)_SHIFT macros. The last two patches enables HugeTLB migration on arm64 and subscribe to this new platform specific hook by defining an override. The second patch differentiates between movability and migratability aspects of huge pages and implements hugepage_movable_supported() which can then be used during allocation to decide whether to place the huge page in movable zone or not. Changes in V3: - Re-ordered patches 1 and 2 per Michal - s/Movability/Migratability/ in unmap_and_move_huge_page() per Naoya Changes in V2: (https://lkml.org/lkml/2018/10/12/190) - Added a new patch which differentiates migratability and movability of huge pages and implements hugepage_movable_supported() function as suggested by Michal Hocko. Anshuman Khandual (5): mm/hugetlb: Distinguish between migratability and movability mm/hugetlb: Enable PUD level huge page migration mm/hugetlb: Enable arch specific huge page size support for migration arm64/mm: Enable HugeTLB migration arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages arch/arm64/Kconfig | 4 ++++ arch/arm64/include/asm/hugetlb.h | 5 +++++ arch/arm64/mm/hugetlbpage.c | 20 +++++++++++++++++ include/linux/hugetlb.h | 48 +++++++++++++++++++++++++++++++++++++--- mm/hugetlb.c | 2 +- mm/migrate.c | 2 +- 6 files changed, 76 insertions(+), 5 deletions(-) -- 2.7.4