From patchwork Mon Sep 28 06:21:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Hubbard X-Patchwork-Id: 255166 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=-7.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=no 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 BB901C2D0A8 for ; Mon, 28 Sep 2020 06:22:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A38E20BED for ; Mon, 28 Sep 2020 06:22:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="IU1bhmM/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726522AbgI1GWB (ORCPT ); Mon, 28 Sep 2020 02:22:01 -0400 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:2535 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726516AbgI1GWB (ORCPT ); Mon, 28 Sep 2020 02:22:01 -0400 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Sun, 27 Sep 2020 23:21:11 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 28 Sep 2020 06:22:00 +0000 Received: from sandstorm.nvidia.com (10.124.1.5) by mail.nvidia.com (172.20.187.12) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Mon, 28 Sep 2020 06:22:00 +0000 From: John Hubbard To: Andrew Morton CC: Jonathan Corbet , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Ralph Campbell , Shuah Khan , LKML , , , , , John Hubbard Subject: [PATCH 0/8] selftests/vm: gup_test, hmm-tests, assorted improvements Date: Sun, 27 Sep 2020 23:21:51 -0700 Message-ID: <20200928062159.923212-1-jhubbard@nvidia.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1601274071; bh=aje0xlQbgGTe8PDh3PLtbmYUZlvyK6r4rrB1MLJQctg=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:MIME-Version: X-NVConfidentiality:Content-Transfer-Encoding:Content-Type; b=IU1bhmM/2JHR6pBNGilbB3FShB1LLkAywl19QB5Dq9eoSE/k7+ELxevvqYtXqAq8W lpwYUDgpCvEYd5KvlYtILKhCPIFgwVjy8alY2Ae/TziZ/b01cpdjtTA1kTbaDkSUSg P0uftuJ3Rvi2tvE3gxeI+W/9o2/NLo03F5o7nNcecoVHGpWQGrpWJTVLrGk2a5kVpY i7lJun/WUkKTaqQcN8XpIdXlqbkKDdfuXWppC9oPH0nlRncS8C9Qo24u1u0xyYQ2Su i4+wGtF0hsKTLsuwwYbklNgRZsq8LugtCEDfcjWbBN0EMBc66t2fhCcRnfuu8hlnTM L3QbLSspGyNig== Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This is based on the latest mmotm. Summary: This series provides two main things, and a number of smaller supporting goodies. The two main points are: 1) Add a new sub-test to gup_test, which in turn is a renamed version of gup_benchmark. This sub-test allows nicer testing of dump_pages(), at least on user-space pages. For quite a while, I was doing a quick hack to gup_test.c whenever I wanted to try out changes to dump_page(). Then Matthew Wilcox asked me what I meant when I said "I used my dump_page() unit test", and I realized that it might be nice to check in a polished up version of that. Details about how it works and how to use it are in the commit description for patch #6. 2) Fixes a limitation of hmm-tests: these tests are incredibly useful, but only if people actually build and run them. And it turns out that libhugetlbfs is a little too effective at throwing a wrench in the works, there. So I've added a little configuration check that removes just two of the 21 hmm-tests, if libhugetlbfs is not available. Further details in the commit description of patch #8. Other smaller things that this series does: a) Remove code duplication by creating gup_test.h. b) Clear up the sub-test organization, and their invocation within run_vmtests.sh. c) Other minor assorted improvements. John Hubbard (8): mm/gup_benchmark: rename to mm/gup_test selftests/vm: use a common gup_test.h selftests/vm: rename run_vmtests --> run_vmtests.sh selftests/vm: minor cleanup: Makefile and gup_test.c selftests/vm: only some gup_test items are really benchmarks selftests/vm: gup_test: introduce the dump_pages() sub-test selftests/vm: run_vmtest.sh: update and clean up gup_test invocation selftests/vm: hmm-tests: remove the libhugetlbfs dependency Documentation/core-api/pin_user_pages.rst | 6 +- arch/s390/configs/debug_defconfig | 2 +- arch/s390/configs/defconfig | 2 +- mm/Kconfig | 21 +- mm/Makefile | 2 +- mm/{gup_benchmark.c => gup_test.c} | 109 ++++++---- mm/gup_test.h | 32 +++ tools/testing/selftests/vm/.gitignore | 3 +- tools/testing/selftests/vm/Makefile | 38 +++- tools/testing/selftests/vm/check_config.sh | 30 +++ tools/testing/selftests/vm/config | 2 +- tools/testing/selftests/vm/gup_benchmark.c | 137 ------------- tools/testing/selftests/vm/gup_test.c | 188 ++++++++++++++++++ tools/testing/selftests/vm/hmm-tests.c | 10 +- .../vm/{run_vmtests => run_vmtest.sh} | 24 ++- 15 files changed, 403 insertions(+), 203 deletions(-) rename mm/{gup_benchmark.c => gup_test.c} (59%) create mode 100644 mm/gup_test.h create mode 100755 tools/testing/selftests/vm/check_config.sh delete mode 100644 tools/testing/selftests/vm/gup_benchmark.c create mode 100644 tools/testing/selftests/vm/gup_test.c rename tools/testing/selftests/vm/{run_vmtests => run_vmtest.sh} (91%)