From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) (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 F232F501290; Mon, 21 Sep 2026 21:19:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=204.191.154.188 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790025599; cv=none; b=WyVsvtz+9FBp/ixmQS3KGY876R6hYMTbtNXphNikyyRMdTI+O6vcGt780BCdt+8JcATWorYBMODNd0BpKI9fOJ+YLgcQIEEVsbgprcPWV0IrzHikbmwzvjqQuGiwgzwaxiiBu9DjB6EP6NNZWBjoxtPYkOX/kikNaP4ZXeFPzBE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790025599; c=relaxed/simple; bh=pVFVNpryK/50omAZCNkcvjfe5nFPxxjWqY4zKIS+Wco=; h=Message-ID:Date:MIME-Version:To:Cc:References:From:In-Reply-To: Content-Type:Subject; b=eQm8JtdEPGsZ/eMSa1ZK4vI3BVhsdakB6+C5CskiDr35W9xD8Oi0ESayWUYXSYBj0fFDOlAjM44WS7TxISJpE0rB6uKU+nna8/m5DPCFxOfZB5XSzzeEbFBU4yQfr+qgedL0iZXrgYmIBRSw61RsQNegVt0Qytnwhsr0QRJ0dlU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com; spf=pass smtp.mailfrom=deltatee.com; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b=ErRE0zur; arc=none smtp.client-ip=204.191.154.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=deltatee.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="ErRE0zur" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:In-Reply-To:From:References:Cc:To: MIME-Version:Date:Message-ID:content-disposition; bh=g1ST6U2BpQn/s3D8UpgYd2KCtTjj3ldN0h2dyB/bZ1Q=; b=ErRE0zursoMY+UMyjDwlvee3Ni KA0G6w/m3ydbimYpQQUck96YqgySKBEOmHmVTKRDnOSBjXwLk823Iyzn19FH5wIRNyOd8lHCcCOKF P4e0/xf7B99zvFBls/UtyMwxWMPlkopEgNqDz2HBzZ+BN0XiC2bQLmA9ey2luseNU9pagmqqvcRBg X5WL28iC9i3rfIjgzKuHTOMbAZBQXwEdIErvGXDZfX/f15ftDFp1bId1GIvg6+M9qgvuceibqnwk3 gV7hSE5AohGjlJ+NEsDquVHADVHT9YX5Kzbjm+P60e79A2ZT0irlax3JIJfDcRd7sn2BOJDrjfqsg 6x4VUOpQ==; Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.98.2) (envelope-from ) id 1x8lQX-0000000F5FQ-0Kc5; Mon, 21 Sep 2026 15:19:54 -0600 Message-ID: <9e868c06-be53-436c-a78d-790ed2b91c3e@deltatee.com> Date: Mon, 21 Sep 2026 15:19:40 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Leon Romanovsky , Bjorn Helgaas , Chaitanya Kulkarni , Greg Kroah-Hartman , Jens Axboe , Alex Williamson , Ankit Agrawal , Jason Gunthorpe , Jonathan Corbet , Shuah Khan , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Randy Dunlap , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, Tushar Dave , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org References: <20260920-fix-p2p-acs-v4-0-v7-0-ca0828ab697c@nvidia.com> <20260920-fix-p2p-acs-v4-0-v7-11-ca0828ab697c@nvidia.com> Content-Language: en-CA From: Logan Gunthorpe In-Reply-To: <20260920-fix-p2p-acs-v4-0-v7-11-ca0828ab697c@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: leon@kernel.org, bhelgaas@google.com, kch@nvidia.com, gregkh@linuxfoundation.org, axboe@kernel.dk, alex@shazbot.org, ankita@nvidia.com, jgg@ziepe.ca, corbet@lwn.net, skhan@linuxfoundation.org, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, rdunlap@infradead.org, sumit.semwal@linaro.org, christian.koenig@amd.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, tdave@nvidia.com, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org X-SA-Exim-Mail-From: logang@deltatee.com X-Spam-Level: Subject: Re: [PATCH v7 11/19] PCI/P2PDMA: Log detailed ACS routing diagnostics X-SA-Exim-Version: 4.2.1 (built Sun, 23 Feb 2025 07:57:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) On 2026-09-20 05:41, Leon Romanovsky wrote: > From: Leon Romanovsky > > When P2PDMA rejects a mapping, existing warnings identify only the final > ACS or host-bridge result. They omit topology, live controls, divergence > ports, cache state, and intermediate routing decisions. > > Emit debug-level messages for verbose calculations and cache lookups. > Report both paths, decoded ACS controls, directional decisions, host > fallback, and the final mapping. This keeps incidental unsupported probes > quiet while allowing the diagnostics to be enabled when needed. > > Tested-by: Tushar Dave > Signed-off-by: Leon Romanovsky Looks good to me: Reviewed-by: Logan Gunthorpe