From patchwork Mon Oct 7 05:45:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11176813 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 D35851599 for ; Mon, 7 Oct 2019 05:45:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A49272133F for ; Mon, 7 Oct 2019 05:45:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727030AbfJGFp2 (ORCPT ); Mon, 7 Oct 2019 01:45:28 -0400 Received: from foss.arm.com ([217.140.110.172]:55216 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727010AbfJGFp2 (ORCPT ); Mon, 7 Oct 2019 01:45:28 -0400 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 6259115AB; Sun, 6 Oct 2019 22:45:26 -0700 (PDT) Received: from p8cg001049571a15.blr.arm.com (p8cg001049571a15.blr.arm.com [10.162.40.136]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 381113F68E; Sun, 6 Oct 2019 22:47:54 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org Cc: Anshuman Khandual , Andrew Morton , Vlastimil Babka , Greg Kroah-Hartman , Thomas Gleixner , Mike Rapoport , Jason Gunthorpe , Dan Williams , Peter Zijlstra , Michal Hocko , Mark Rutland , Mark Brown , Steven Price , Ard Biesheuvel , Masahiro Yamada , Kees Cook , Tetsuo Handa , Matthew Wilcox , Sri Krishna chowdary , Dave Hansen , Russell King - ARM Linux , Michael Ellerman , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Vineet Gupta , James Hogan , Paul Burton , Ralf Baechle , "Kirill A . Shutemov" , Gerald Schaefer , Christophe Leroy , Mike Kravetz , linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V4 0/2] mm/debug: Add tests for architecture exported page table helpers Date: Mon, 7 Oct 2019 11:15:22 +0530 Message-Id: <1570427124-21887-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org This series adds a test validation for architecture exported page table helpers. Patch in the series adds basic transformation tests at various levels of the page table. Before that it exports gigantic page allocation function from HugeTLB. This test was originally suggested by Catalin during arm64 THP migration RFC discussion earlier. Going forward it can include more specific tests with respect to various generic MM functions like THP, HugeTLB etc and platform specific tests. https://lore.kernel.org/linux-mm/20190628102003.GA56463@arrakis.emea.arm.com/ Changes in V4: - Disable DEBUG_ARCH_PGTABLE_TEST for ARM and IA64 platforms Changes in V3: (https://lore.kernel.org/patchwork/project/lkml/list/?series=411216) - Changed test trigger from module format into late_initcall() - Marked all functions with __init to be freed after completion - Changed all __PGTABLE_PXX_FOLDED checks as mm_pxx_folded() - Folded in PPC32 fixes from Christophe Changes in V2: https://lore.kernel.org/linux-mm/1568268173-31302-1-git-send-email-anshuman.khandual@arm.com/T/#t - Fixed small typo error in MODULE_DESCRIPTION() - Fixed m64k build problems for lvalue concerns in pmd_xxx_tests() - Fixed dynamic page table level folding problems on x86 as per Kirril - Fixed second pointers during pxx_populate_tests() per Kirill and Gerald - Allocate and free pte table with pte_alloc_one/pte_free per Kirill - Modified pxx_clear_tests() to accommodate s390 lower 12 bits situation - Changed RANDOM_NZVALUE value from 0xbe to 0xff - Changed allocation, usage, free sequence for saved_ptep - Renamed VMA_FLAGS as VMFLAGS - Implemented a new method for random vaddr generation - Implemented some other cleanups - Dropped extern reference to mm_alloc() - Created and exported new alloc_gigantic_page_order() - Dropped the custom allocator and used new alloc_gigantic_page_order() Changes in V1: https://lore.kernel.org/linux-mm/1567497706-8649-1-git-send-email-anshuman.khandual@arm.com/ - Added fallback mechanism for PMD aligned memory allocation failure Changes in RFC V2: https://lore.kernel.org/linux-mm/1565335998-22553-1-git-send-email-anshuman.khandual@arm.com/T/#u - Moved test module and it's config from lib/ to mm/ - Renamed config TEST_ARCH_PGTABLE as DEBUG_ARCH_PGTABLE_TEST - Renamed file from test_arch_pgtable.c to arch_pgtable_test.c - Added relevant MODULE_DESCRIPTION() and MODULE_AUTHOR() details - Dropped loadable module config option - Basic tests now use memory blocks with required size and alignment - PUD aligned memory block gets allocated with alloc_contig_range() - If PUD aligned memory could not be allocated it falls back on PMD aligned memory block from page allocator and pud_* tests are skipped - Clear and populate tests now operate on real in memory page table entries - Dummy mm_struct gets allocated with mm_alloc() - Dummy page table entries get allocated with [pud|pmd|pte]_alloc_[map]() - Simplified [p4d|pgd]_basic_tests(), now has random values in the entries Original RFC V1: https://lore.kernel.org/linux-mm/1564037723-26676-1-git-send-email-anshuman.khandual@arm.com/ Cc: Andrew Morton Cc: Vlastimil Babka Cc: Greg Kroah-Hartman Cc: Thomas Gleixner Cc: Mike Rapoport Cc: Jason Gunthorpe Cc: Dan Williams Cc: Peter Zijlstra Cc: Michal Hocko Cc: Mark Rutland Cc: Mark Brown Cc: Steven Price Cc: Ard Biesheuvel Cc: Masahiro Yamada Cc: Kees Cook Cc: Tetsuo Handa Cc: Matthew Wilcox Cc: Sri Krishna chowdary Cc: Dave Hansen Cc: Russell King - ARM Linux Cc: Michael Ellerman Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: "David S. Miller" Cc: Vineet Gupta Cc: James Hogan Cc: Paul Burton Cc: Ralf Baechle Cc: Kirill A. Shutemov Cc: Gerald Schaefer Cc: Christophe Leroy Cc: Mike Kravetz Cc: linux-snps-arc@lists.infradead.org Cc: linux-mips@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org Anshuman Khandual (2): mm/hugetlb: Make alloc_gigantic_page() available for general use mm/pgtable/debug: Add test validating architecture page table helpers arch/x86/include/asm/pgtable_64_types.h | 2 + include/linux/hugetlb.h | 9 + mm/Kconfig.debug | 15 + mm/Makefile | 1 + mm/arch_pgtable_test.c | 440 ++++++++++++++++++++++++ mm/hugetlb.c | 24 +- 6 files changed, 489 insertions(+), 2 deletions(-) create mode 100644 mm/arch_pgtable_test.c