From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f54.google.com (mail-qv1-f54.google.com [209.85.219.54]) (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 A4E7622FDEA for ; Tue, 3 Jun 2025 13:35:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748957714; cv=none; b=eLfEEVwfJ2Ct5RB6Lt0zCsrvlIBcCH0K7ydkqHEvD+jCSLx91HgfhhTLPoF7mZ1f2j3ysleC+uShhBAER0p7Klk1c7XJMt6/uRyEF6oM2LkE5zm31rK2bcwVSD1+HiSqKgpnDRcX2ACDpaqTySngARhQl2bj8MvNDt5HSrQwUFA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748957714; c=relaxed/simple; bh=6aXyILyNFzvdfLvnjhe+7eEg65vKZaS3Xgt9s4P7IoA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Yi3YyJz+2WrF+UaWK66JzU4v83E0O2GShGDmnmM20uLs0kMGD3KamKnSTEYCrE5B9r7gdSFd/7DuaXdRLNdvBKyLKS8Y8cHoCZNmv1ITASZCFTSRd4p8JtcPqsVpmUi6puyTH5OSNtkfP5K4Db+L792Gm8nm3x2ad7/fVrJ45ik= 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=L9faMCZo; arc=none smtp.client-ip=209.85.219.54 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="L9faMCZo" Received: by mail-qv1-f54.google.com with SMTP id 6a1803df08f44-6fad4e6d949so22732176d6.0 for ; Tue, 03 Jun 2025 06:35:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1748957710; x=1749562510; 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=csMjX6EgdDvsoUroDDkC2t6M2H8xOJU7irccfVA/OHY=; b=L9faMCZoU5k/eDkzQK021wVY5FNVNBtn7krLf6IoxlHpm1QF2vWzXGv0u7r8BdGjAm 1ZfBSaDxx3E9EAaIl/9pE9ng1Ii3grLFqUSNGGaK/HmxD9aPIBsW35Zgihs/nAsL0Pj0 DB8vqs9CFLwCTqERpAvT061kIhjcj3MYkTlunlPQb+nFkd+h4UHb1+UK5G6X5N4nFEQQ sJPnqYrKWS9tONkmVjTCC/GacIFCzFqn+4L4+rl4h+tk40iZk7kbUbSsFPC4JZsFF0YK YM+kJYa126BBD/AZ0Vw6T1+y8HPQFkyAjcpfoGYjT4hjB5l0PB43dSKVcIDuV8xRE9Cb gDPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748957710; x=1749562510; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=csMjX6EgdDvsoUroDDkC2t6M2H8xOJU7irccfVA/OHY=; b=cSHUqhgnRolKKiAB+OatTkVcQYOBF9qpZBdZygv0zF7sCGjqWYcGQCg0M9IgZkKYu6 lLflq9sk2yoiXF+K7noRzxyPmEevKphegnj4OFpI24/Q1rNCvG7EwgN9RjdP3n57P74/ K3q+NVNyEV+j0QgY86ZG0+X+BfE4/HfzJ01c8EsMiOTCGRhHdvKtWRRlPjy6abfdk7w7 o5kHyk6JIXDj8wfb6vj5aYqynkbK1b7L5u346qcUvAzOuVfQY2jmQHwYGPef1LyQDEKw lpiLlWe2nWhoUVCQ6cd5jObbXL+YoPXCLbg0r7QdNfOmBCW/dZyDtBOlkrXfwEPYluuI hAEA== X-Forwarded-Encrypted: i=1; AJvYcCU40UcqZYhVEuKjFBXPk6fXKgEj6ETB2HnTvxPXs5Rv/EwXGVdCgIDqLfgzswrQ8vJ5Khr5yV6MmPwehFQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzJ+7fpMd6XJpIft9MUCEwO2wv+2+ZM3iKIIbjMr62FJtEI1pR7 A72jF4jQqWrdcqxqWJoiz41zhLuTZgaXiEMXuntrGyyHOmR1AOdTnKm9T5wSiNiOH5I= X-Gm-Gg: ASbGncsDn0O+BkrM14c5fT7bdrskPnzILtblf6lHibWVaIteUIJkcoPm+bEUTh/Mnsk N+AwirV1kPYlJKYgnE4M8G+638T/0Qpm3D1vL+c+ONTJuXVe8u2+Yul3WOTGX/lzz8/qgYeM1Qy HNNjXtV8qvgy5guX5NXHCapLQ0GJ4+hwQfg0mwajNY8U9ifVWxba20wS7xvErCaJ15rCEIA33HX twW3Od2PU/SRxSJTNK5uRxu/jyO+wHTKSjsTxRv2sJI9YrogIONvNMOuL4OIKjwUpH+ZJnsEkVf h/88233XdJ8JdA5DVTr/8gFSomQ5hfdH70eBfjI3e3SiAqIXr055LCIn2hbLm9jOC7hXEHf4mdc vGd7ScjCDwFpDmM/rDX9IgsGA+debe4ORpRQFKg== X-Google-Smtp-Source: AGHT+IGTO1Uq6qWKkHjHjzXPtbeutCQLStskBTpgABiXf8IiWIF7+BRGzTPM/WsKdaJBbv1DscVTNw== X-Received: by 2002:a05:6214:d87:b0:6eb:1e80:19fa with SMTP id 6a1803df08f44-6fad9090760mr153489766d6.1.1748957710547; Tue, 03 Jun 2025 06:35:10 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-167-56-70.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.167.56.70]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6fac6e2fc45sm80639296d6.122.2025.06.03.06.35.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Jun 2025 06:35:10 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1uMRnJ-00000001h4R-2OPU; Tue, 03 Jun 2025 10:35:09 -0300 Date: Tue, 3 Jun 2025 10:35:09 -0300 From: Jason Gunthorpe To: Alistair Popple Cc: linux-mm@kvack.org, gerald.schaefer@linux.ibm.com, dan.j.williams@intel.com, willy@infradead.org, david@redhat.com, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, zhang.lyra@gmail.com, debug@rivosinc.com, bjorn@kernel.org, balbirs@nvidia.com, lorenzo.stoakes@oracle.com, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-cxl@vger.kernel.org, dri-devel@lists.freedesktop.org, John@groves.net Subject: Re: [PATCH 02/12] mm: Convert pXd_devmap checks to vma_is_dax Message-ID: <20250603133509.GC386142@ziepe.ca> References: <224f0265027a9578534586fa1f6ed80270aa24d5.1748500293.git-series.apopple@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <224f0265027a9578534586fa1f6ed80270aa24d5.1748500293.git-series.apopple@nvidia.com> On Thu, May 29, 2025 at 04:32:03PM +1000, Alistair Popple wrote: > Currently dax is the only user of pmd and pud mapped ZONE_DEVICE > pages. Therefore page walkers that want to exclude DAX pages can check > pmd_devmap or pud_devmap. However soon dax will no longer set PFN_DEV, > meaning dax pages are mapped as normal pages. > > Ensure page walkers that currently use pXd_devmap to skip DAX pages > continue to do so by adding explicit checks of the VMA instead. > > Signed-off-by: Alistair Popple > --- > fs/userfaultfd.c | 2 +- > mm/hmm.c | 2 +- > mm/userfaultfd.c | 2 +- > 3 files changed, 3 insertions(+), 3 deletions(-) Reviewed-by: Jason Gunthorpe Jason