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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 AA383C433DF for ; Fri, 16 Oct 2020 03:05:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 51D262087D for ; Fri, 16 Oct 2020 03:05:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817506; bh=2MmKW2JhmIMFZIOpDejchO9il/DiQmYY5LeKIrTs+UQ=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=Xfh9/EGz3Zty6s8mEW3S2HYk0sPQ+prTpYq5MGU5NcLgmNW5Q2NZekY3eOtzN06zS yAHXmx+guTGx/L62qIEEb6ZtYftKX+0Vp92gxRH2N2d3U0OOZdTnEwA9WsIcsulB+3 2SAm+MEHK3Liu/2Ww4jLgwQKhfuDp4xtnLKUVEsI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392194AbgJPDFG (ORCPT ); Thu, 15 Oct 2020 23:05:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:43868 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728261AbgJPDFF (ORCPT ); Thu, 15 Oct 2020 23:05:05 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C4DAC20789; Fri, 16 Oct 2020 03:05:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817504; bh=2MmKW2JhmIMFZIOpDejchO9il/DiQmYY5LeKIrTs+UQ=; h=Date:From:To:Subject:In-Reply-To:From; b=ZLx36Am3p7BJiMeOQ9wwKSwKGQjlWGYAmm3fjobqYCyo+fJtB2WVRc+ea3JdEZR8B MA9Ufw7k3r3gfNnuC5bsvCwCHoYNMP97NQgc4UBdhAAlUQuxQn8Kw7Hm5K9s8t2gjP dXyQK/Yh7d0s66iQUKq7q8YypsogZ1o1ohGBfz5w= Date: Thu, 15 Oct 2020 20:05:03 -0700 From: Andrew Morton To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, christophe.leroy@csgroup.eu, mm-commits@vger.kernel.org, mpe@ellerman.id.au, torvalds@linux-foundation.org Subject: [patch 013/156] mm/debug_vm_pgtable/hugetlb: disable hugetlb test on ppc64 Message-ID: <20201016030503.9QiW-ZwdX%akpm@linux-foundation.org> In-Reply-To: <20201015194043.84cda0c1d6ca2a6847f2384a@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: "Aneesh Kumar K.V" Subject: mm/debug_vm_pgtable/hugetlb: disable hugetlb test on ppc64 The seems to be missing quite a lot of details w.r.t allocating the correct pgtable_t page (huge_pte_alloc()), holding the right lock (huge_pte_lock()) etc. The vma used is also not a hugetlb VMA. ppc64 do have runtime checks within CONFIG_DEBUG_VM for most of these. Hence disable the test on ppc64. [anshuman.khandual@arm.com: drop hugetlb_advanced_tests()] Link: https://lore.kernel.org/lkml/289c3fdb-1394-c1af-bdc4-5542907089dc@linux.ibm.com/#t Link: https://lkml.kernel.org/r/1600914446-21890-1-git-send-email-anshuman.khandual@arm.com Link: https://lkml.kernel.org/r/20200902114222.181353-13-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V Signed-off-by: Anshuman Khandual Cc: Christophe Leroy Cc: Michael Ellerman Signed-off-by: Andrew Morton --- mm/debug_vm_pgtable.c | 51 ---------------------------------------- 1 file changed, 51 deletions(-) --- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-hugetlb-disable-hugetlb-test-on-ppc64 +++ a/mm/debug_vm_pgtable.c @@ -810,57 +810,8 @@ static void __init hugetlb_basic_tests(u WARN_ON(!pte_huge(pte_mkhuge(pte))); #endif /* CONFIG_ARCH_WANT_GENERAL_HUGETLB */ } - -static void __init hugetlb_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, - pte_t *ptep, unsigned long pfn, - unsigned long vaddr, pgprot_t prot) -{ - struct page *page = pfn_to_page(pfn); - pte_t pte = ptep_get(ptep); - unsigned long paddr = __pfn_to_phys(pfn) & PMD_MASK; - - pr_debug("Validating HugeTLB advanced\n"); - pte = pte_mkhuge(mk_pte(pfn_to_page(PHYS_PFN(paddr)), prot)); - set_huge_pte_at(mm, vaddr, ptep, pte); - barrier(); - WARN_ON(!pte_same(pte, huge_ptep_get(ptep))); - huge_pte_clear(mm, vaddr, ptep, PMD_SIZE); - pte = huge_ptep_get(ptep); - WARN_ON(!huge_pte_none(pte)); - - pte = mk_huge_pte(page, prot); - set_huge_pte_at(mm, vaddr, ptep, pte); - barrier(); - huge_ptep_set_wrprotect(mm, vaddr, ptep); - pte = huge_ptep_get(ptep); - WARN_ON(huge_pte_write(pte)); - - pte = mk_huge_pte(page, prot); - set_huge_pte_at(mm, vaddr, ptep, pte); - barrier(); - huge_ptep_get_and_clear(mm, vaddr, ptep); - pte = huge_ptep_get(ptep); - WARN_ON(!huge_pte_none(pte)); - - pte = mk_huge_pte(page, prot); - pte = huge_pte_wrprotect(pte); - set_huge_pte_at(mm, vaddr, ptep, pte); - barrier(); - pte = huge_pte_mkwrite(pte); - pte = huge_pte_mkdirty(pte); - huge_ptep_set_access_flags(vma, vaddr, ptep, pte, 1); - pte = huge_ptep_get(ptep); - WARN_ON(!(huge_pte_write(pte) && huge_pte_dirty(pte))); -} #else /* !CONFIG_HUGETLB_PAGE */ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot) { } -static void __init hugetlb_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, - pte_t *ptep, unsigned long pfn, - unsigned long vaddr, pgprot_t prot) -{ -} #endif /* CONFIG_HUGETLB_PAGE */ #ifdef CONFIG_TRANSPARENT_HUGEPAGE @@ -1065,8 +1016,6 @@ static int __init debug_vm_pgtable(void) pud_populate_tests(mm, pudp, saved_pmdp); spin_unlock(ptl); - hugetlb_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot); - spin_lock(&mm->page_table_lock); p4d_clear_tests(mm, p4dp); pgd_clear_tests(mm, pgdp); _