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=1793874095; b=QAIHdM6YDHRy+6jUQf6dohWYSlG0pedpG1gjRK0RY/ImyPQ3iUbGgGWOutECTI6dZalM qTZMvZ7xIbj+h1y64yPCduuCoCPjAucLbWMoP/6eq2ReXVbrrvneRb6Sk6mQq5d+tWA1C N8XYow5xSDdUCw37aoW20mdgMY7LkUFC8u0vHj+Y4l9S6jSf8Psaa5SOqA1goxYNRVL/X tPZEtZmi8oo0SX/3/kVJ4yt3lKDeY2HARfY/JKA/xuwedtmgvYaARRNOR1DhbPrl0iXE0 vCesKDkFaehm8nf57Ug9R6NQ3EeDQ1uP/pYI8sOiSzEyh4fgXqNayHhY9aqV8gIRKAA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793874095; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=s1K1EQLqOXj3fT22EwpIZjKDQB4P0bMP3Y6DY3YtSYw=; b=OO8ZPAh5caYolVUS7I0PZ34Ne3s8hzuuMoiI2Tg9Ijaztu1zhKBR8ukcj7i43Ju5a+2I glwJ53Fsq6D8/vpj2BhQyYU/QXZU/ZkDHroeicEAJjQY0K+BUIrQ+3vrO1TjBzOVez4SE IovmdjbYpebWaKDXaivZkYoeQjyyvdq2J7Z5EaC99e1zdr7wodnxhOSq4rIm+3azB7j5+ 3I1AQF8lr7xzbgWYiVBwPeYhSRXafZMoluDD+camSvLSLGu7NefINI63ciVvPFFTiENbJ 2BYP5QhTDWzXwA32WMuFaKNWh+CIf9oIEPvsZiT2uZ84NiOSVxyf10tLFxztHDJJsDA== 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=lnQiSwWv; 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 0F9C2606D80D; Thu, 5 Nov 2026 10:21:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=lnQiSwWv Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCB3D1F00A15; Thu, 5 Nov 2026 10:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793874094; bh=s1K1EQLqOXj3fT22EwpIZjKDQB4P0bMP3Y6DY3YtSYw=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=lnQiSwWvV9jmq564ZRuFhV0GTcDcLnNk/tqpvNXUNnEfIXJ+ZSzHRtnF4U23RdpYU T5+1Xkrm0aktRojYvAVELcupRcifYKwVIJtGDNLYDwjyt5SxvBDFyAOp5VCRH8VrX1 Z4nuroYGhFU36xk9adXweuO65fVG8bVjZPvh8QS95skH9k9FT8rHcN4/gOd0Hz4wsI PsFJXCRqpq+h+wcr4e1Itet6tZYXQrmY54ANpq+4OtEm0XwmOtJmrCiXtl9RYLM5nm 9hCmr2d58gZPyekWhjg+TszjY99Sc/2d1yCjPjBF7y+GZ7obZ0WwHXJBAsM9JAizyM PsfQKwlONOaWQ== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v13 03/19] PCI/P2PDMA: Derive routing from directional ACS controls Reply-To: sashiko-reviews@lists.linux.dev To: "Leon Romanovsky" Cc: linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org In-Reply-To: <20261105-fix-p2p-acs-v4-0-v13-3-3dd065907c3b@nvidia.com> References: <20261105-fix-p2p-acs-v4-0-v13-0-3dd065907c3b@nvidia.com> <20261105-fix-p2p-acs-v4-0-v13-3-3dd065907c3b@nvidia.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 05 Nov 2026 10:21:34 +0000 X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > From: Leon Romanovsky >=20 > pci_bridge_has_acs_redir() treats Request and Completion Redirect as > interchangeable. On asymmetric fabrics, a control for only the reverse TLP > direction can unnecessarily force P2PDMA through the host bridge. >=20 > Evaluate Request Redirect for the Requester's Requests and Completion > Redirect for the Completer's read Completions. Continue treating enabled > Egress Control conservatively as a Request redirect. >=20 > Fixes: 52916982af48 ("PCI/P2PDMA: Support peer-to-peer memory") > Reviewed-by: Logan Gunthorpe > Tested-by: Tushar Dave > Signed-off-by: Leon Romanovsky Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261105-fix-p2p-ac= s-v4-0-v13-0-3dd065907c3b@nvidia.com?part=3D3