From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794554715; b=ROAiHlQYZhuEpE5xlZAaQpLd7YZ+izpNtMa2gRGXlL2haR5win6YQDv06Fxb8JS8DNF4 3oOMS0+Nbka+H9vSB1rUBt3g8gn6wJGeA/9C/I7zieqR44ej3DwTgTPvuLo5rO81FzjDn WzMfdq17zeAAug1YeaH9wLyKZq6dUOH087hZnatI4sxttrpgdj1loEVEE+L5zJYaXkaH7 joLZgtfi/sTzDGncGeqFYb6ueFh9Da0AEqDhmSgHvZMMTMEDxgeFw4R6XsWsa8d+VJkcp MHX78Y2+XN2eMtOvHQmEYRWRut5c+zxUD38LhWXsEBynO/XKfgvjEnTS2vpJ9zKT6rQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794554715; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=ajwiPX+jV6AKXI463gQtW4uBICZf0evjdTw2WWjpWVQ=; b=s1xgldOCN5405psx84xOAqGJBFApOwpzt+BuW4/rHe8re8KB6PPg/hvClukVBm6fS1GB j4XHhjTS65KO2t12okA2WCl0VtxqNSNt8WUEqNUDB9TCfe6k3t91pCx3QVFCcR0nssVLL CLI7UPEsb5ql5+Fe7XRqeyq9F54WKpJ5azU98B8xjAOlseThnkbcYCMvnnI3/edWT+8ux Zw0325iD+GZjeX9cE/NIo72nPsCEun6st7T71gnu+HiAS3zNEKn+zXrvOzflSudKzJHL7 TKKGuo4Bx6qwm1bVgvx1DmiAc/yfhIA+v1lgFMB+MNryF0F/iw3PrLlm7hmG2HoUrvg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AeBve0fM; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6574D606A31C for ; Fri, 13 Nov 2026 07:25:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AeBve0fM Received: by smtp.kernel.org (Postfix) with ESMTPSA id A68091F000C4; Fri, 13 Nov 2026 07:25:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794554714; bh=ajwiPX+jV6AKXI463gQtW4uBICZf0evjdTw2WWjpWVQ=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=AeBve0fMb7UbAB6/nBt/o3mR11mqIO3oovEyQXq4P0I5yCaVroLO5TPT4Rb/DDshq fhoSpmSrRCCrZzBX38WfQBUSbSUJ8mM3j+0CyHNGBXMWQMHU7mU/k9miA0WtlnWeOl bB50SsB1f0pG4Sit052h6Mulb18Y79A9xrqmU71vrdQApOlZHLfP6RDaNfJ6p3tnp1 0Iz+2e8UODITu4SbAHMMX6suyM8fxIgEWDo7y6c+MiVZ53GFDD5YQxAvxjVXpb88k3 enyTRD+/0CShdh/Kg/QvxBjxWiIouUuC0IqWqsWQQqpJQSvkMlVYqY+wJ2z6AhdvrB /NCMW0+jj/eKQ== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [RFC PATCH v2 7/8] dax: refuse dma-buf iterators in dax_iomap_rw() Reply-To: sashiko-reviews@lists.linux.dev To: "Mengmeng Zhao" Cc: linux-ext4@vger.kernel.org, tytso@mit.edu In-Reply-To: <20261113070621.273953-8-mengmeng.zhao@linux.dev> References: <20261113070621.273953-1-mengmeng.zhao@linux.dev> <20261113070621.273953-8-mengmeng.zhao@linux.dev> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 13 Nov 2026 07:25:14 +0000 X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > From: Mengmeng Zhao >=20 > DAX copies data through the CPU, so a dma-buf iterator has no meaning > in the DAX I/O path and must be refused. A DAX inode does not get > FMODE_CAN_DMABUF_IO at open time, but DAX can be enabled later, so > check per I/O. >=20 > Signed-off-by: Mengmeng Zhao > Signed-off-by: Li Wang Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261113070621.2739= 53-1-mengmeng.zhao@linux.dev?part=3D7