From patchwork Fri Oct 16 02:41:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11840525 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 C3D1316BC for ; Fri, 16 Oct 2020 02:41:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 73586208E4 for ; Fri, 16 Oct 2020 02:41:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="r5mxBY8c" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 73586208E4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9167C94000F; Thu, 15 Oct 2020 22:41:38 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 8C5CD940007; Thu, 15 Oct 2020 22:41:38 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7DBF594000F; Thu, 15 Oct 2020 22:41:38 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0083.hostedemail.com [216.40.44.83]) by kanga.kvack.org (Postfix) with ESMTP id 50C3E940007 for ; Thu, 15 Oct 2020 22:41:38 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id EAFE3181AEF00 for ; Fri, 16 Oct 2020 02:41:37 +0000 (UTC) X-FDA: 77376237834.24.wool80_200660927219 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin24.hostedemail.com (Postfix) with ESMTP id C725E1A4A0 for ; Fri, 16 Oct 2020 02:41:37 +0000 (UTC) X-Spam-Summary: 1,0,0,34a75575868281d6,d41d8cd98f00b204,akpm@linux-foundation.org,,RULES_HIT:41:355:379:800:960:967:973:988:989:1260:1345:1359:1381:1431:1437:1534:1542:1711:1730:1747:1777:1792:1963:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3353:3865:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4321:4605:5007:6119:6261:6653:7576:7903:8784:9025:9545:10004:11026:11473:11658:11914:12043:12048:12114:12216:12296:12297:12438:12517:12519:12555:12679:12986:13255:14096:14181:14721:21080:21451:21627:21939:30054,0,RBL:198.145.29.99:@linux-foundation.org:.lbl8.mailshell.net-64.100.201.201 62.2.0.100;04yfbkm34iu95kfrearh5fft4jktrocrh5q1ijou876e6kb9cj4nxz1smqqeckd.qe466nnhptswfjpwaq8ymaggb14yyhpn81fgcdoj58n779xwofguzy7i58t5zqm.a-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: wool80_200660927219 X-Filterd-Recvd-Size: 3943 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Fri, 16 Oct 2020 02:41:37 +0000 (UTC) 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 F09B320897; Fri, 16 Oct 2020 02:41:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602816096; bh=Nb9tQGDI8yHhkaGfKu7Xm2mtYuc1EFEfYccGxgvNkBI=; h=Date:From:To:Subject:In-Reply-To:From; b=r5mxBY8c/CyoJUC5pW6yq+i5NiEQBcHPM65kaQVOb+3AVQn0x7L7siqfFKfDgufV3 0N8gc/qBhyiQhYJojUxzoFXx0qmeKOfRBJQREllGueFPKbLrvG1W9dY1kWqW9W8MHp qfaxHhTEWPE6IqBGMmPBzOpS0Ljz6t8SJtJGxV6I= Date: Thu, 15 Oct 2020 19:41:35 -0700 From: Andrew Morton To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, christophe.leroy@csgroup.eu, linux-mm@kvack.org, 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: <20201016024135.knNP-r5gv%akpm@linux-foundation.org> In-Reply-To: <20201015192732.f448da14e9854c7cb7299956@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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);