From patchwork Sun May 8 08:58:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baolin Wang X-Patchwork-Id: 12842268 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AC2DC433F5 for ; Sun, 8 May 2022 08:59:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231450AbiEHJDK (ORCPT ); Sun, 8 May 2022 05:03:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231389AbiEHJDB (ORCPT ); Sun, 8 May 2022 05:03:01 -0400 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35FAABCB9; Sun, 8 May 2022 01:59:10 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R461e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=12;SR=0;TI=SMTPD_---0VCZrFBZ_1652000346; Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0VCZrFBZ_1652000346) by smtp.aliyun-inc.com(127.0.0.1); Sun, 08 May 2022 16:59:07 +0800 From: Baolin Wang To: catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, mike.kravetz@oracle.com, akpm@linux-foundation.org, sj@kernel.org Cc: baolin.wang@linux.alibaba.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 3/3] mm/damon/vaddr: Change to use huge_ptep_get_access_flags() Date: Sun, 8 May 2022 16:58:54 +0800 Message-Id: X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The ARM64 platform can support CONT-PTE/PMD size hugetlb, which can contain seravel continuous pte or pmd entries. However current huge_ptep_get() only return one specific pte value for the CONT-PTE or CONT-PMD size hugetlb, which did not take into accounts the subpages' dirty or young flags. That will make the hugetlb pages monitoring inaccurate with missing young flags. Thus change to use huge_ptep_get_access_flags() taking into accounts the subpages' dirty or young flags of a CONT-PTE/PMD size hugetlb. Signed-off-by: Baolin Wang --- mm/damon/vaddr.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index d6abf76..29459ed 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -400,7 +400,8 @@ static void damon_hugetlb_mkold(pte_t *pte, struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr) { bool referenced = false; - pte_t entry = huge_ptep_get(pte); + pte_t entry = huge_ptep_get_access_flags(pte, + huge_page_size(hstate_vma(vma))); struct page *page = pte_page(entry); get_page(page); @@ -557,7 +558,7 @@ static int damon_young_hugetlb_entry(pte_t *pte, unsigned long hmask, pte_t entry; ptl = huge_pte_lock(h, walk->mm, pte); - entry = huge_ptep_get(pte); + entry = huge_ptep_get_access_flags(pte, huge_page_size(h)); if (!pte_present(entry)) goto out;