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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 1791DECDE32 for ; Wed, 17 Oct 2018 08:19:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFABF21526 for ; Wed, 17 Oct 2018 08:19:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFABF21526 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 S1727390AbeJQQNz (ORCPT ); Wed, 17 Oct 2018 12:13:55 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:47358 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727111AbeJQQNz (ORCPT ); Wed, 17 Oct 2018 12:13:55 -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 589C8EBD; Wed, 17 Oct 2018 01:19:23 -0700 (PDT) Received: from [10.162.0.72] (unknown [10.162.0.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B22CB3F71C; Wed, 17 Oct 2018 01:19:19 -0700 (PDT) Subject: Re: [PATCH V2 0/5] arm64/mm: Enable HugeTLB migration 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 References: <1539316799-6064-1-git-send-email-anshuman.khandual@arm.com> From: Anshuman Khandual Message-ID: Date: Wed, 17 Oct 2018 13:49:17 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <1539316799-6064-1-git-send-email-anshuman.khandual@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/2018 09:29 AM, Anshuman Khandual wrote: > 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 V2: > > - Added a new patch which differentiates migratability and movability > of huge pages and implements hugepage_movable_supported() function > as suggested by Michal Hocko. Hello Andrew/Michal/Mike/Naoya/Catalin, Just checking for an update. Does this series looks okay ? - Anshuman