From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B4D035E948; Fri, 3 Jul 2026 07:06:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783062416; cv=none; b=bFtkpiVbiDImNaEfIu5V7lwwYk1aPUJ2houbtPCe17YNBY9IRVuyRruep64H43QmQ+Yqd0i6Qn0bP0cmOMKdecBOif9Ynq98Wth7iHoNq9kXfUhHDUo9QNu34M2bAPT2scQBIOyWeF+MrOLhtpZ76BBjZaXSuwL3Po+yMd38wXo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783062416; c=relaxed/simple; bh=0ogwKdsOqMxGsrviDWLl5i+dwAUsbydpZ/cZ6aQ7j6A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=eOKszaGAx7VAsHJzitPEXdxD/a5cWdHPvbHtKVDxeLVpMu65IroHMJtTGJiLlwTtCYTivznLjtuka7q+QJ0vetsFUTuyr73fGwikKRKGZKUoc1qS5uar79SmdI4I5gm2uEctJqhQPG+jOxR0yA4w64up2pk+SS2EDmF2G67Kjgk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DnR1vQWE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DnR1vQWE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3A661F000E9; Fri, 3 Jul 2026 07:06:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783062415; bh=4piB+34XL+KRHk/H7cX5eonmByAQ55KhjuwPcounnz0=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=DnR1vQWEy7SOqZOkad+cMz408hpbdEeW1rFEXVMkJQGbj0pIJMlUurDtkcAC66OqC Wn91EDTa/5pobK+HuZ4dbs4W1cVmDrqVT2hNGnm6F+uPv9+NGBnYLTWMTvIMOQrIDD xJt2AEWEa4WHkGrSnW7bZSGaXeW25aL664SlQ06qm7Yb/ZLHjmbLS2BRL+MavVdudO XeA4Thj0htfCJBSAkqepkMS1NmmYSIiblcXXhKKHdAIMmlcvuKYnGBkSklagStYqlk 0Qlp/bplhyrEH4j8SeqazuMtCQQkn/oLiJUqxsCXF8Mio8EBqpoVdQW4Dyx2cDgyGD ol27RsdpjMhYQ== Message-ID: <705431a4-c301-41df-87ab-c0b4a4069f97@kernel.org> Date: Fri, 3 Jul 2026 09:06:42 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/6] mm/rmap: use huge_ptep_get() in try_to_unmap_one() To: Dev Jain , muchun.song@linux.dev, osalvador@suse.de, akpm@linux-foundation.org, ljs@kernel.org, liam@infradead.org Cc: riel@surriel.com, vbabka@kernel.org, harry@kernel.org, jannh@google.com, lance.yang@linux.dev, kas@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rcampbell@nvidia.com, apopple@nvidia.com, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, j-nomura@ce.jp.nec.com, nao.horiguchi@gmail.com, ak@linux.intel.com, mel@csn.ul.ie, pfalcato@suse.de, jpoimboe@kernel.org, dave.hansen@intel.com, tglx@kernel.org, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, ryan.roberts@arm.com, anshuman.khandual@arm.com, stable@vger.kernel.org References: <20260702051341.126509-1-dev.jain@arm.com> <20260702051341.126509-3-dev.jain@arm.com> <00d6e0fb-dcba-45d5-98c0-f5ed81604ca0@kernel.org> <1b1f6281-2a46-4811-bbea-24a666c0a772@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit >>> diff --git a/mm/rmap.c b/mm/rmap.c >>> index 1c77d5dc06e9f..aa8a254efaecc 100644 >>> --- a/mm/rmap.c >>> +++ b/mm/rmap.c >>> @@ -2095,11 +2095,16 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma, >>> /* Unexpected PMD-mapped THP? */ >>> VM_BUG_ON_FOLIO(!pvmw.pte, folio); >>> >>> - /* >>> - * Handle PFN swap PTEs, such as device-exclusive ones, that >>> - * actually map pages. >>> - */ >> >> That comment now actually belongs above the pte_present() check below. > > Oops I mindlessly just copied the comment. > > I will then rather put it in the else block which gets the pfn from the softleaf, > that is the most appropriate. Works for me, thanks -- Cheers, David