From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793618548; b=sUcGDuOHeBLEOX5CZi7aQWGbj0qmWexgjaM2v1d3zDWhhnZEM+cOeqG8yq86VvAFDP5Z O8jCHglV7yiJEag0Kv+ZSuL+X7fWt4AoI0mkH4SdHhZCeEOGLEtYFm1TtE60H71/tL8Xx I+V9J4UmHK5lHoEHzxo8DIIUwA431J956sxopi2i7r1vnKk235UBmKc+rF+uTNUENcaiC 6VIBfLO5jY93eyhzbe5fCiKyZVsrD/G0Ml53vTmIEUTLIMV//9N4uChTkbgQDbdItaiy4 mEk2qYG23lm8ojcZ1L9Za0n//uiKU4xp851B/c7JKqMpu5kiJyhpuZQay5Z4Pb8SoPg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793618548; h=DMARC-Filter:Received:Received:DKIM-Signature:From:Date:Subject: MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id: References:In-Reply-To:To:Cc:X-Mailer:X-Developer-Signature: X-Developer-Key; bh=8hJ1iPHVTbYTDAq/C1HnaYE5+XA4A6mgYVB8Pyb4aLM=; b=e1W8PM1QF2Iiu1YsrnNBSKWKwkjUj2pwU9JV9Mu/DNUJA9fiUhw06rJxCB4ARAkhaJpa wjyeN5aeIgaKk2AmkwbF9dbCBtKc07jVI25qP0xNSLI5qM/8ABHGXOiVq7Z6DcXFg4AwJ Dz1G+S6vZmrRMh0RJSCdQExy3a/w5OPkkYMvvsLPWPfccbF5xo14/4wiik3AqNa3W9b9Z 5pL1J7S0tYEiz49RPZ53l94QsWQMgneb1Pc+l9KLmTf8yaR0UVOUHLkfn1+0yPs/xwIfF 1jTV6qetM9rtQZ0y3bmGNLf6AjrML+V/wShnpb8k4Cwnrp3CzxGR1wXjdiBPxIdODfw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=YdZ50qos; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 668E860A3838; Mon, 2 Nov 2026 11:22:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 668E860A3838 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=YdZ50qos Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 99907293B; Mon, 2 Nov 2026 03:22:23 -0800 (PST) Received: from e129823.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7612A3F632; Mon, 2 Nov 2026 03:22:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793618546; bh=/Ssd4kAdbyYc2WVWtdpRP5Vxi5IuwO7Iv1puKU0SNto=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=YdZ50qos+A3w9ZaM+D9UJ7oLQBvwyhsBU/ruoPIHunkF9HB8/GvUZPOFwIhq0hj+b XMmZmMiyF5M+zRGKttEOthHofyTIfdOb6kRAKiJfrH27FTrj7aQ3tXK4ZJ1L2PFzo+ h5y+NPPSkIndHx1iv7x0/IC7DPBuyoL72xdV5wCE= From: Yeoreum Yun Date: Mon, 02 Nov 2026 11:21:21 +0000 Subject: [PATCH RESEND v2 08/21] mm: vmscan: remove stack copy address of pud/pmd pass in walk_pud/pmd_range() X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261102-dummy_ptxp3-v2-8-78840b2ec73c@arm.com> References: <20261102-dummy_ptxp3-v2-0-78840b2ec73c@arm.com> In-Reply-To: <20261102-dummy_ptxp3-v2-0-78840b2ec73c@arm.com> To: Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , Catalin Marinas , Will Deacon , Arnd Bergmann , Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Johannes Weiner , David Hildenbrand , Michal Hocko , Lorenzo Stoakes , Tianrui Zhao , Bibo Mao , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonas Bonn , Stefan Kristiansson , Stafford Horne Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-openrisc@vger.kernel.org, Muhammad Usama Anjum , Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1374; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=/Ssd4kAdbyYc2WVWtdpRP5Vxi5IuwO7Iv1puKU0SNto=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBq6HIyfn2gL02dSTH4U1Digx7JtPpPj8Bgyn8x9 UoFtdHycjSJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCauhyMgAKCRBt1cPRWsUx Mz/2C/42LrIml4kwQBW+YjAT4YcNn/U4Nb8+hQWZ9x0kXwPAdxvb9J43k+UVxO9ahHOIk6g6HIT XtZL/MTOK7/jgTNkxXqFVeYK8VyzWEiqpibgZjNpiX9XLh6Z8cmnp8G47IUvXkJP0wA+Hmakv3A 9myK1wyAcp0SHF/i/sVsHm7iyIbMyGfGc6Z5CBiWiTjnDvafMkvBazMphB0j5dU46MUuWd+W7qy GwEdURQVvkAFrul/krfqIl8qyLzn4vPYYBCRYUd4SCIlcw5QjS3Qthc6ED7WMnukAn35Yx6W0oL oPVAV5N01l94+aU9yml7y7eXDNrR6dgu0Ocio3vbsU2eTqNw/dYDJL0PD+h2rPLcEwUkPmIQlTt o0ewlFkj/UUYwiFIUbO3PGph11XhYzVDb++4zdSLnOfSYG/ZBB9EGVS2GVUt55QTEBEc3tRmB+f YQCEfFaDjsnzZBrd0gL/KZqDv8WqDSWqrGeR2W82At20bHA5Qs1wSXjJiIn3cDFFKuyPg= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, replace passing the address of a stack copy of a pud/pmd to walk_pmd/pte_range() with passing the pud/pmd pointer directly so that makes allowing folded entries to be ignored and check the concurrent access proeprly otherwise pXd_same() would return always true. Reviewed-by: Muhammad Usama Anjum Signed-off-by: Yeoreum Yun --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 9959ca158ce83..6a1af9b92349f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3911,7 +3911,7 @@ static void walk_pmd_range(pud_t *pud, unsigned long start, unsigned long end, walk->mm_stats[MM_NONLEAF_FOUND]++; - if (!walk_pte_range(&val, addr, next, args)) + if (!walk_pte_range(pmd + i, addr, next, args)) continue; walk->mm_stats[MM_NONLEAF_ADDED]++; @@ -3947,7 +3947,7 @@ static int walk_pud_range(p4d_t *p4d, unsigned long start, unsigned long end, if (!pud_present(val) || WARN_ON_ONCE(pud_leaf(val))) continue; - walk_pmd_range(&val, addr, next, args); + walk_pmd_range(pud + i, addr, next, args); if (need_resched() || walk->batched >= MAX_LRU_BATCH) { end = (addr | ~PUD_MASK) + 1; -- 2.43.0