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 CA3A1C433DF for ; Fri, 16 Oct 2020 03:04:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F75420897 for ; Fri, 16 Oct 2020 03:04:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817498; bh=Nb9tQGDI8yHhkaGfKu7Xm2mtYuc1EFEfYccGxgvNkBI=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=F54glJ2PBvvTgG+P1nBrcFJH0AB4YgIjKdvEHmFgXBeSRQrE/iqBaZR9VAXEkEJhq b5+X4R7zby1EG5Zag1FfS7STZfW8xhXYXF/NYR1coumgx4UDwdZRkPU6EaEtab6XIX /bvgELW1QC4C7e78L+7jfQSBuH6jMitt1fowB4D4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392129AbgJPDE6 (ORCPT ); Thu, 15 Oct 2020 23:04:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:43806 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728261AbgJPDE6 (ORCPT ); Thu, 15 Oct 2020 23:04:58 -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 25F6C20789; Fri, 16 Oct 2020 03:04:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817497; bh=Nb9tQGDI8yHhkaGfKu7Xm2mtYuc1EFEfYccGxgvNkBI=; h=Date:From:To:Subject:In-Reply-To:From; b=ewyyvFffkJzIaSs8TjuROlUbfjCETUvrOl78ns49Pt66AbvRlzkp12Nq9ui2Id9tD NHc41Z1FK8oyXTwGeOa8iVdyN4bre3bv+PPO8e0FcyzzhlNwNn8CPWpkghpiOG2149 PBVhFwMIfutbWddoSmdo1fIPDEaVZFbS4KLIs53s= Date: Thu, 15 Oct 2020 20:04:56 -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 011/156] mm/debug_vm_pgtable/thp: use page table depost/withdraw with THP Message-ID: <20201016030456.5r1S0YG4g%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/thp: use page table depost/withdraw with THP Architectures like ppc64 use deposited page table while updating the huge pte entries. Link: https://lkml.kernel.org/r/20200902114222.181353-11-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V Reviewed-by: Anshuman Khandual Cc: Christophe Leroy Cc: Michael Ellerman Signed-off-by: Andrew Morton --- mm/debug_vm_pgtable.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-thp-use-page-table-depost-withdraw-with-thp +++ a/mm/debug_vm_pgtable.c @@ -154,7 +154,7 @@ static void __init pmd_basic_tests(unsig static void __init pmd_advanced_tests(struct mm_struct *mm, struct vm_area_struct *vma, pmd_t *pmdp, unsigned long pfn, unsigned long vaddr, - pgprot_t prot) + pgprot_t prot, pgtable_t pgtable) { pmd_t pmd; @@ -165,6 +165,8 @@ static void __init pmd_advanced_tests(st /* Align the address wrt HPAGE_PMD_SIZE */ vaddr = (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE; + pgtable_trans_huge_deposit(mm, pmdp, pgtable); + pmd = pmd_mkhuge(pfn_pmd(pfn, prot)); set_pmd_at(mm, vaddr, pmdp, pmd); pmdp_set_wrprotect(mm, vaddr, pmdp); @@ -193,6 +195,8 @@ static void __init pmd_advanced_tests(st pmdp_test_and_clear_young(vma, vaddr, pmdp); pmd = READ_ONCE(*pmdp); WARN_ON(pmd_young(pmd)); + + pgtable = pgtable_trans_huge_withdraw(mm, pmdp); } static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot) @@ -371,7 +375,7 @@ static void __init pud_basic_tests(unsig static void __init pmd_advanced_tests(struct mm_struct *mm, struct vm_area_struct *vma, pmd_t *pmdp, unsigned long pfn, unsigned long vaddr, - pgprot_t prot) + pgprot_t prot, pgtable_t pgtable) { } static void __init pud_advanced_tests(struct mm_struct *mm, @@ -1048,7 +1052,7 @@ static int __init debug_vm_pgtable(void) ptl = pmd_lock(mm, pmdp); pmd_clear_tests(mm, pmdp); - pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot); + pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot, saved_ptep); pmd_huge_tests(pmdp, pmd_aligned, prot); pmd_populate_tests(mm, pmdp, saved_ptep); spin_unlock(ptl); _