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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 04E7BD711CA for ; Fri, 19 Dec 2025 06:03:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6E64D6B008C; Fri, 19 Dec 2025 01:03:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6B2906B0092; Fri, 19 Dec 2025 01:03:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5557A6B0093; Fri, 19 Dec 2025 01:03:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 417F76B008C for ; Fri, 19 Dec 2025 01:03:13 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 05DFE60207 for ; Fri, 19 Dec 2025 06:03:13 +0000 (UTC) X-FDA: 84235177866.08.F6BDC9B Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) by imf10.hostedemail.com (Postfix) with ESMTP id 9BCF4C0016 for ; Fri, 19 Dec 2025 06:03:10 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=MPrmVe2s; spf=pass (imf10.hostedemail.com: domain of baolin.wang@linux.alibaba.com designates 115.124.30.111 as permitted sender) smtp.mailfrom=baolin.wang@linux.alibaba.com; dmarc=pass (policy=none) header.from=linux.alibaba.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1766124191; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Umqy+CieAvau1WCrcGlezOzuDWrvWtrJZghCjmaOXp0=; b=nOnqrAY660HSd6virqvXi+ScMZFRY2RVpW30LCWPyeqfX0ol1AvzLN5q5SfyMyXEP3pujO uXU3eS8ULVJ0YAU93Z3/R90X9CV6sWJAG3ZAcX2U7RGq4oRjAeXJK7mCqIY1xDX2r6jRq8 B7UsNgXPCiegESSYPBOKC/KPleBvJN8= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1766124191; a=rsa-sha256; cv=none; b=Q86ihFtYf0T2/aGy6M7Q6+sVy07WF3qRWYSURQkoSDFoGMVBi/KYwNZXXyVFKtY7hBfo2m pCqQK/g5eZuLz+o4xYaRDQRRd45VK703yplXsx5G55KuJHSGwfQzXYFXf/e8xF6lhL/kPT gUvFCbRa8M4FkQXGN1WmDZGk2sAG72g= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=MPrmVe2s; spf=pass (imf10.hostedemail.com: domain of baolin.wang@linux.alibaba.com designates 115.124.30.111 as permitted sender) smtp.mailfrom=baolin.wang@linux.alibaba.com; dmarc=pass (policy=none) header.from=linux.alibaba.com DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1766124188; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=Umqy+CieAvau1WCrcGlezOzuDWrvWtrJZghCjmaOXp0=; b=MPrmVe2swWEM/mWhhjQll5XSLRICHgZyd9ABTLim93PaNFPizxY/CVk2uxuA9PZyQOWbkUB47DFfG9qW6K2N5P5b9MYqKH+x8cBaaL8FdjHSGYg1HEO5o5Gj/65fV376BfAKGQD3DD59BSqc6mHkMzN+8GeH6ICwcs12c3ExERA= Received: from localhost(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0WvBV0.x_1766124186 cluster:ay36) by smtp.aliyun-inc.com; Fri, 19 Dec 2025 14:03:06 +0800 From: Baolin Wang To: akpm@linux-foundation.org, david@kernel.org, catalin.marinas@arm.com, will@kernel.org Cc: lorenzo.stoakes@oracle.com, ryan.roberts@arm.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, riel@surriel.com, harry.yoo@oracle.com, jannh@google.com, willy@infradead.org, baohua@kernel.org, dev.jain@arm.com, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/5] arm64: mm: support batch clearing of the young flag for large folios Date: Fri, 19 Dec 2025 14:02:53 +0800 Message-ID: <0fc85ceb11b26e2fd0bc164df0391c7117881c61.1766121341.git.baolin.wang@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: hyifmmbmofmkeuxc4p1xmq4rbiqo5zko X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9BCF4C0016 X-Rspam-User: X-HE-Tag: 1766124190-732663 X-HE-Meta: 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 vGz9qWhc KE0Uz3VWJ6/2v/jWH+sAMxKGC7s0xzsTrvf8RgaYiXa4N+CehmfVuis5p53u7EGhmEcCIYZGaMObFS0llV/gyi+kw9WANh2GIx917pF/YwIpvzlMBCZQQNGwfyAO8kmVeb8bhANhpJZt2qvOIFpy50noZXPfxb9h0RfUgOrDGx9wZrIlI6QhLcnJ366rFbjSzSRpFswW1V5POSSTo1Pxjr9R9AF6EjdO6bDdyaCBT3PMVUHatiN3T6DdBgXyV7zworfrD 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: List-Subscribe: List-Unsubscribe: Currently, contpte_ptep_test_and_clear_young() and contpte_ptep_clear_flush_young() only clear the young flag and flush TLBs for PTEs within the contiguous range. To support batch PTE operations for other sized large folios in the following patches, adding a new parameter to specify the number of PTEs that map consecutive pages of the same large folio in a single VMA and a single page table. While we are at it, rename the functions to maintain consistency with other contpte_*() functions. Signed-off-by: Baolin Wang --- arch/arm64/include/asm/pgtable.h | 12 ++++++------ arch/arm64/mm/contpte.c | 33 ++++++++++++++++++-------------- 2 files changed, 25 insertions(+), 20 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 0944e296dd4a..9086753f68b4 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1679,10 +1679,10 @@ extern void contpte_clear_full_ptes(struct mm_struct *mm, unsigned long addr, extern pte_t contpte_get_and_clear_full_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned int nr, int full); -extern int contpte_ptep_test_and_clear_young(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep); -extern int contpte_ptep_clear_flush_young(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep); +int contpte_test_and_clear_young_ptes(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr); +int contpte_clear_flush_young_ptes(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, unsigned int nr); extern void contpte_wrprotect_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned int nr); extern int contpte_ptep_set_access_flags(struct vm_area_struct *vma, @@ -1854,7 +1854,7 @@ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, if (likely(!pte_valid_cont(orig_pte))) return __ptep_test_and_clear_young(vma, addr, ptep); - return contpte_ptep_test_and_clear_young(vma, addr, ptep); + return contpte_test_and_clear_young_ptes(vma, addr, ptep, CONT_PTES); } #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH @@ -1866,7 +1866,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, if (likely(!pte_valid_cont(orig_pte))) return __ptep_clear_flush_young(vma, addr, ptep); - return contpte_ptep_clear_flush_young(vma, addr, ptep); + return contpte_clear_flush_young_ptes(vma, addr, ptep, CONT_PTES); } #define wrprotect_ptes wrprotect_ptes diff --git a/arch/arm64/mm/contpte.c b/arch/arm64/mm/contpte.c index c73e77207584..c0f89af605e0 100644 --- a/arch/arm64/mm/contpte.c +++ b/arch/arm64/mm/contpte.c @@ -508,8 +508,9 @@ pte_t contpte_get_and_clear_full_ptes(struct mm_struct *mm, } EXPORT_SYMBOL_GPL(contpte_get_and_clear_full_ptes); -int contpte_ptep_test_and_clear_young(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep) +int contpte_test_and_clear_young_ptes(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, + unsigned int nr) { /* * ptep_clear_flush_young() technically requires us to clear the access @@ -518,41 +519,45 @@ int contpte_ptep_test_and_clear_young(struct vm_area_struct *vma, * contig range when the range is covered by a single folio, we can get * away with clearing young for the whole contig range here, so we avoid * having to unfold. + * + * The 'nr' means consecutive (present) PTEs that map consecutive pages + * of the same large folio in a single VMA and a single page table. */ + unsigned long end = addr + nr * PAGE_SIZE; int young = 0; - int i; - ptep = contpte_align_down(ptep); - addr = ALIGN_DOWN(addr, CONT_PTE_SIZE); - - for (i = 0; i < CONT_PTES; i++, ptep++, addr += PAGE_SIZE) + ptep = contpte_align_addr_ptep(&addr, &end, ptep, nr); + for (; addr != end; ptep++, addr += PAGE_SIZE) young |= __ptep_test_and_clear_young(vma, addr, ptep); return young; } -EXPORT_SYMBOL_GPL(contpte_ptep_test_and_clear_young); +EXPORT_SYMBOL_GPL(contpte_test_and_clear_young_ptes); -int contpte_ptep_clear_flush_young(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep) +int contpte_clear_flush_young_ptes(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, + unsigned int nr) { int young; - young = contpte_ptep_test_and_clear_young(vma, addr, ptep); + young = contpte_test_and_clear_young_ptes(vma, addr, ptep, nr); if (young) { + unsigned long end = addr + nr * PAGE_SIZE; + + contpte_align_addr_ptep(&addr, &end, ptep, nr); /* * See comment in __ptep_clear_flush_young(); same rationale for * eliding the trailing DSB applies here. */ - addr = ALIGN_DOWN(addr, CONT_PTE_SIZE); - __flush_tlb_range_nosync(vma->vm_mm, addr, addr + CONT_PTE_SIZE, + __flush_tlb_range_nosync(vma->vm_mm, addr, end, PAGE_SIZE, true, 3); } return young; } -EXPORT_SYMBOL_GPL(contpte_ptep_clear_flush_young); +EXPORT_SYMBOL_GPL(contpte_clear_flush_young_ptes); void contpte_wrprotect_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned int nr) -- 2.47.3