From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f41.google.com (mail-qv1-f41.google.com [209.85.219.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE45A306D3D for ; Fri, 21 Nov 2025 23:44:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763768700; cv=none; b=DnVKzJrOsedH//laY50iZ2ldSXpJXY/14elqD/+KyKgGoFjE6laV9p53PPLNxKTGhdR4ArMv+sy9CEGIjt/xmtW+i4oR9PdI9E3OGGZS++sueN2XEQNhDA5IJOB4iLGgezWhsNZnQOxzYRSrk4Tj30ZBf4AmNyCVmmCtMoW9wuA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763768700; c=relaxed/simple; bh=94wkD2Iff42VLMlQNWegA9dtRPkkPQ7m6y0iMS1EKU4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=PVmwGWbh/zepG1RKa/GMbNI4DXPMMANdGjK9ys9wZLxxfqFnyZ1ujYJgyD01RjzeztGTTHYFXSBewj1Q2AZ3Fp1d5kKJfYdph64RveoyoKFmUBNXVo7sdf2slMF7sa2rdWyLik9vzCmzCdd4uPjNJE9BLh5YZtj4YXc438aslDc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b=Q+tMdxDI; arc=none smtp.client-ip=209.85.219.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="Q+tMdxDI" Received: by mail-qv1-f41.google.com with SMTP id 6a1803df08f44-8823cde292eso26285306d6.2 for ; Fri, 21 Nov 2025 15:44:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1763768697; x=1764373497; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=94wkD2Iff42VLMlQNWegA9dtRPkkPQ7m6y0iMS1EKU4=; b=Q+tMdxDIkYXfhGhbArV0cRrjxNICLqpDxMfcVn6I12tSlGAKpER9GWu29DpBkymHRH 8+vkLMXGdoMlRW1a8I3ymoYVhDXsc/zbDPsgk6dDtzh5juXd/l67yjvfrH6E2PCz7eSS 0MnjazwGK0NRKyGqz2ACeRLGXyKvPtxTJ44QTasOxTfU2yErAHu4Ks44MCuNoubORnaA NCszOMN2Fla6VYB5ksgTIT29Z+nNac5UtoL3AGZVjOASPrtxjkUtZa4MLYMQCVpwpWT+ xGLv13APEgGlkzM7Ys1yHg1j8bxhQAP5ngjohGYQXdfFgg/Iu3KmptXD0DSIe/JPz0hm mf6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763768697; x=1764373497; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=94wkD2Iff42VLMlQNWegA9dtRPkkPQ7m6y0iMS1EKU4=; b=WsfsBk/RS6qhzclgXerjyiV9RCgvYpa1a1nue6QxalzpSnA6X/AyYmwjPPnVOiSBnB dNpKZrlOcQxOvArIv2dptZaMmdCNc2A/em8CZrtrDzdnEFcqRsOujrcPOsKUbl9pmUHN PO6yT+OtsOG91hogO1v/qZ25WgouJcIMdF4nYclNfLYR87w2q2VYgNu+sYswGujNkt20 vNWqZLigHxR+5Pu4EwU+P7Lqdg9RB42YSoRdvvQ+RzukgrZi28F9wn2wF6H7XTNEq4c+ nn57+lkeMXIKcClrMgOCuzCrX1w1dzD2B405pUIyHdsFAc+I1ps3JrXqHou0Ps4yNz8W 2ntg== X-Forwarded-Encrypted: i=1; AJvYcCUTN3hsjBQWtUAwY76blGAOktoccIcPGLIxU+HniTCHNoXRAJiWSuGTL7CO1UealpIsX0nnZ54Rirr2@vger.kernel.org X-Gm-Message-State: AOJu0Yzm+LzQ6+/HzYUmj6RBLkxMSaHXKeR/R+hZdT3CQeT/Z0bWOXHB ADpKWuUxjx/BJb4M1nXWDJb/EIEHQjcF8jpRUaY9FpAvoKldEmrf/rPdBgG2O5tZbv8= X-Gm-Gg: ASbGnctDo/9FNl4qgaFKc8r6DAhZt6z5hTYtThBW4v3TiszO3zLqaP3jhFF3/eZPTZB rrXz6fHj8Gat45f8VpYx+KwyM2uJ6QWPsvXq0kAFElK3RdoszockfGe9l/X/eh1z+RkMbz+gC4K L7Nge3eYvytY45DvG6UbwyH3CzidyQuFKYRI9ItNCzDl5h8cNoKRth4arcLjrODcjM8w9DvOkTG xeRRtVOT34pMmioM2Ck4LDxv8xNjzrBkVprbnivrF55G18Edmm/ax4ira8n7pIO9cB81vbiq2AC gjygXFgBDwHE4DlU7mXGrpqZyH4drVZSna0LGchgscKuiIjpgEXx59mcK5QANLnwwmjZnDdtcZH CDEn10Uf7zgtHvgLcA7i2Ml1rF6PttsUaUGl28uJ8AA8dnvU/TvBcWk1LZJi+6QwxvBfNeevlIo DAnZV5kInVR7ARK23cS1j+hbPmnzJQT3QYCyUB/XA6g81XRxgU/T6zjVS9 X-Google-Smtp-Source: AGHT+IEos7T2Axz389Mmy3AFU8+Jfh3PFehz2HfOxc6qgzO/Its691H7QS0uM/0VDIYstKPPxEQUqg== X-Received: by 2002:a05:6214:226c:b0:87d:fc3e:6d9b with SMTP id 6a1803df08f44-8847c525de0mr61714186d6.42.1763768697300; Fri, 21 Nov 2025 15:44:57 -0800 (PST) Received: from ziepe.ca (hlfxns017vw-47-55-120-4.dhcp-dynamic.fibreop.ns.bellaliant.net. [47.55.120.4]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8846e54c32csm48350666d6.37.2025.11.21.15.44.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Nov 2025 15:44:56 -0800 (PST) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1vMaoC-00000001bmD-0arX; Fri, 21 Nov 2025 19:44:56 -0400 Date: Fri, 21 Nov 2025 19:44:56 -0400 From: Jason Gunthorpe To: Lorenzo Stoakes Cc: Andrew Morton , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Sven Schnelle , Peter Xu , Alexander Viro , Christian Brauner , Jan Kara , Arnd Bergmann , Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Muchun Song , Oscar Salvador , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Axel Rasmussen , Yuanchu Xie , Wei Xu , Kemeng Shi , Kairui Song , Nhat Pham , Baoquan He , Chris Li , SeongJae Park , Matthew Wilcox , Leon Romanovsky , Xu Xin , Chengming Zhou , Jann Horn , Miaohe Lin , Naoya Horiguchi , Pedro Falcato , Pasha Tatashin , Rik van Riel , Harry Yoo , Hugh Dickins , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, damon@lists.linux.dev Subject: Re: [PATCH v2 00/16] mm: remove is_swap_[pte, pmd]() + non-swap entries, introduce leaf entries Message-ID: <20251121234456.GA383361@ziepe.ca> References: Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Nov 10, 2025 at 10:21:18PM +0000, Lorenzo Stoakes wrote: > There's an established convention in the kernel that we treat leaf page > tables (so far at the PTE, PMD level) as containing 'swap entries' should > they be neither empty (i.e. p**_none() evaluating true) nor present > (i.e. p**_present() evaluating true). I browsed through this series and want to give some encourgement that this looks nice and is a big step forward! Lots of details to check the conversions so I wouldn't give any tags due to lack of time.. Jason