From patchwork Tue Mar 24 05:22:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11454477 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D88F917D4 for ; Tue, 24 Mar 2020 05:23:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B487320714 for ; Tue, 24 Mar 2020 05:23:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="FfkAQeJV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B487320714 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-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=tLm9/WYkIToNdiP99Hu8BB2N/x/kLargc9uK2zOaRUw=; b=Ffk AQeJV7B0NwKoOD1h6WBbrVj/QcgP/qxguEEez081fc5eaMYCFo0eA0SZ7rAFewKPhTDkNTdV0oKJm T0YNxjyumGV9d2nexnIUXUq3EI9nV5lXzIXRCHk9MXeAvNWYQRd08N4w3UllByPPruz4pKP7C2yxE j4AX/d+2o7/RZkmmcbiYpzd59rLbeuG9bDEEwPJjv42AZZLgyFCLHZeZlHNmj3lsMwG98AyUajLem glmoWdFnblJaHmkV4/0xUG3rb40Dn1PLKMpCQqls/yHmVFcnxZmZ1ZAbQaE8pAhz60hEhKYOZaTp+ L/MOpPvcSJjWQsTTGRlU6EVSu/sVw+Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGc2B-0000Bh-0p; Tue, 24 Mar 2020 05:23:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGc26-0000AM-Qo; Tue, 24 Mar 2020 05:23:24 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4CB3F30E; Mon, 23 Mar 2020 22:23:19 -0700 (PDT) Received: from p8cg001049571a15.arm.com (unknown [10.163.1.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6AE573F7C3; Mon, 23 Mar 2020 22:27:15 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org Subject: [PATCH V2 0/3] mm/debug: Add more arch page table helper tests Date: Tue, 24 Mar 2020 10:52:52 +0530 Message-Id: <1585027375-9997-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200323_222322_959567_B862EE05 X-CRM114-Status: GOOD ( 12.68 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-doc@vger.kernel.org, Benjamin Herrenschmidt , Heiko Carstens , Paul Mackerras , "H. Peter Anvin" , linux-riscv@lists.infradead.org, Will Deacon , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Jonathan Corbet , Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Catalin Marinas , linux-snps-arc@lists.infradead.org, Vasily Gorbik , Anshuman Khandual , Borislav Petkov , Paul Walmsley , "Kirill A . Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, christophe.leroy@c-s.fr, Vineet Gupta , linux-kernel@vger.kernel.org, Palmer Dabbelt , Andrew Morton , linuxppc-dev@lists.ozlabs.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This series adds more arch page table helper tests. The new tests here are either related to core memory functions and advanced arch pgtable helpers. This also creates a documentation file enlisting all expected semantics as suggested by Mike Rapoport (https://lkml.org/lkml/2020/1/30/40). This series has been tested on arm64 and x86 platforms. There is just one expected failure on arm64 that will be fixed when we enable THP migration. [ 21.741634] WARNING: CPU: 0 PID: 1 at mm/debug_vm_pgtable.c:782 which corresponds to WARN_ON(!pmd_present(pmd_mknotpresent(pmd_mkhuge(pmd)))) There are many TRANSPARENT_HUGEPAGE and ARCH_HAS_TRANSPARENT_HUGEPAGE_PUD ifdefs scattered across the test. But consolidating all the fallback stubs is not very straight forward because ARCH_HAS_TRANSPARENT_HUGEPAGE_PUD is not explicitly dependent on ARCH_HAS_TRANSPARENT_HUGEPAGE. This series has been build tested on many platforms including the ones that subscribe the test through ARCH_HAS_DEBUG_VM_PGTABLE. This series is based on v5.6-rc7 after applying these following patches. 1. https://patchwork.kernel.org/patch/11431277/ 2. https://patchwork.kernel.org/patch/11452185/ Changes in V2: - Dropped CONFIG_ARCH_HAS_PTE_SPECIAL per Christophe - Dropped CONFIG_NUMA_BALANCING per Christophe - Dropped CONFIG_HAVE_ARCH_SOFT_DIRTY per Christophe - Dropped CONFIG_MIGRATION per Christophe - Replaced CONFIG_S390 with __HAVE_ARCH_PMDP_INVALIDATE - Moved page allocation & free inside swap_migration_tests() per Christophe - Added CONFIG_TRANSPARENT_HUGEPAGE to protect pfn_pmd() - Added CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD to protect pfn_pud() - Added a patch for other arch advanced page table helper tests - Added a patch creating a documentation for page table helper semantics Changes in V1: (https://patchwork.kernel.org/patch/11408253/) Cc: Jonathan Corbet Cc: Andrew Morton Cc: Mike Rapoport Cc: Vineet Gupta Cc: Catalin Marinas Cc: Will Deacon Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Kirill A. Shutemov Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: linux-snps-arc@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-riscv@lists.infradead.org Cc: x86@kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Anshuman Khandual (3): mm/debug: Add tests validating arch page table helpers for core features mm/debug: Add tests validating arch advanced page table helpers Documentation/mm: Add descriptions for arch page table helpers Documentation/vm/arch_pgtable_helpers.rst | 256 ++++++++++ mm/debug_vm_pgtable.c | 594 +++++++++++++++++++++- 2 files changed, 839 insertions(+), 11 deletions(-) create mode 100644 Documentation/vm/arch_pgtable_helpers.rst