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=-8.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 42475C388F7 for ; Thu, 12 Nov 2020 22:22:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D916822201 for ; Thu, 12 Nov 2020 22:22:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="DRu2kukR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726011AbgKLWWC (ORCPT ); Thu, 12 Nov 2020 17:22:02 -0500 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:10755 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725894AbgKLWWC (ORCPT ); Thu, 12 Nov 2020 17:22:02 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Thu, 12 Nov 2020 14:22:06 -0800 Received: from rcampbell-dev.nvidia.com (172.20.13.39) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 12 Nov 2020 22:22:00 +0000 Subject: Re: [RFC PATCH 1/6] mm: huge_memory: add new debugfs interface to trigger split huge page on any page range. To: Zi Yan , , Matthew Wilcox CC: "Kirill A . Shutemov" , Roman Gushchin , Andrew Morton , , , Yang Shi , Michal Hocko , John Hubbard , David Nellans References: <20201111204008.21332-1-zi.yan@sent.com> <20201111204008.21332-2-zi.yan@sent.com> X-Nvconfidentiality: public From: Ralph Campbell Message-ID: <69294b6a-ecfb-fac0-2725-9ac0b73f43aa@nvidia.com> Date: Thu, 12 Nov 2020 14:22:00 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20201111204008.21332-2-zi.yan@sent.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1605219726; bh=MRJlV+jO9gQUfjeyUA6U+V092g79T0PX8NmUSZOQA4M=; h=Subject:To:CC:References:X-Nvconfidentiality:From:Message-ID:Date: User-Agent:MIME-Version:In-Reply-To:Content-Type:Content-Language: Content-Transfer-Encoding:X-Originating-IP:X-ClientProxiedBy; b=DRu2kukRl/lA6HAt0sSPrNuNAeeDllmZ4MCT2N15qwy9uWDjHXylosjnqdoSkFug/ aSbUzZ4dX2j1XwcgdOsZVrvjZmNYZ9qVl2BHD3UwI7JZ2HftIeSVsyMz7FGcEV913/ 5wpp2eviTofUCf6m1/qBBycpd2xiNJV+9ZIovokIc6wAYmb2dE+1+UV8iPiUCq8+qO hOqJWDkmO+1G2Z8ijgPI5iuxb3c6Qdw7TFihOLonojO3fPjEng/E+uk7gY+QVgqfh3 Z/PjgFEUU9+f0FGmFYaBXMoa2zwvXPhNq9btwYKcrws+iLOQ/MeZJQUoAumLle/A9W BetRm4hX3RY+w== Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On 11/11/20 12:40 PM, Zi Yan wrote: > From: Zi Yan > > Huge pages in the process with the given pid and virtual address range > are split. It is used to test split huge page function. In addition, > a testing program is added to tools/testing/selftests/vm to utilize the > interface by splitting PMD THPs. > > Signed-off-by: Zi Yan > --- > mm/huge_memory.c | 98 +++++++++++ > mm/internal.h | 1 + > mm/migrate.c | 2 +- > tools/testing/selftests/vm/Makefile | 1 + > .../selftests/vm/split_huge_page_test.c | 161 ++++++++++++++++++ > 5 files changed, 262 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/vm/split_huge_page_test.c Don't forget to update ".gitignore" to include "split_huge_page_test".