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From: Leon Romanovsky <leon@kernel.org>
To: Logan Gunthorpe <logang@deltatee.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jens Axboe <axboe@kernel.dk>, Alex Williamson <alex@shazbot.org>,
	Ankit Agrawal <ankita@nvidia.com>, Jason Gunthorpe <jgg@ziepe.ca>,
	Jonathan Corbet <corbet@lwn.net>,
	Shuah Khan <skhan@linuxfoundation.org>,
	"Joerg Roedel (AMD)" <joro@8bytes.org>,
	Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-doc@vger.kernel.org, iommu@lists.linux.dev,
	Tushar Dave <tdave@nvidia.com>
Subject: Re: [PATCH v4 18/18] PCI/P2PDMA: Log detailed ACS routing diagnostics
Date: Sun, 30 Aug 2026 11:37:48 +0300	[thread overview]
Message-ID: <20260830083748.GB24140@unreal> (raw)
In-Reply-To: <154f7e6c-741a-4b31-9514-3d9066034958@deltatee.com>

On Tue, Aug 25, 2026 at 02:02:26PM -0600, Logan Gunthorpe wrote:
> 
> 
> On 2026-08-21 13:38, Leon Romanovsky wrote:
> > +	if (ret) {
> > +		pci_info(pdev,
> > +			 "P2PDMA ACS debug: Egress Control Vector read at %#x failed: %#x\n",
> > +			 offset, ret);
> 
> This patch seems to add a lot of printk()s with "debug" text. I'm
> wondering if maybe they should all be pci_dbg() prints? People trying to
> debug why they can't enable P2PDMA would want to enable them. Machines
> that are just accidentally doing a P2PDMA transaction and are not
> supported won't spew a lot more noise to dmesg.
> 
> In either case, I might suggest just dropping the "debug" prefix as I'm
> not sure it adds extra value.

Sure, I will change it. I wasn't sure how this patch would be received in
the first place.

Thanks

> 
> Logan
> 
> 

  reply	other threads:[~2026-08-30  8:37 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-21 19:38 [PATCH v4 00/18] PCI/P2PDMA: Fix ACS egress control handling Leon Romanovsky
2026-08-21 19:38 ` [PATCH v4 01/18] PCI/P2PDMA: Do not tear down the allocate attribute on registration failure Leon Romanovsky
2026-08-21 19:53   ` sashiko-bot
2026-08-21 23:08   ` Logan Gunthorpe
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 02/18] PCI/P2PDMA: Wait for RCU readers before freeing state Leon Romanovsky
2026-08-21 19:48   ` sashiko-bot
2026-08-21 23:10   ` Logan Gunthorpe
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 03/18] PCI/P2PDMA: Restrict the p2pmem search to pool backed providers Leon Romanovsky
2026-08-21 19:59   ` sashiko-bot
2026-08-21 23:14   ` Logan Gunthorpe
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 04/18] PCI/P2PDMA: Safely terminate ACS redirect lists Leon Romanovsky
2026-08-21 19:47   ` sashiko-bot
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 05/18] PCI/P2PDMA: Document the pdev->p2pdma lifetime and RCU rules Leon Romanovsky
2026-08-21 19:56   ` sashiko-bot
2026-08-24 20:29   ` I Logan Gunthorpe
2026-08-30  9:14     ` I Leon Romanovsky
2026-08-21 19:38 ` [PATCH v4 06/18] PCI/P2PDMA: Gate the host bridge whitelist warning on verbose Leon Romanovsky
2026-08-21 19:47   ` sashiko-bot
2026-08-24 21:08   ` Logan Gunthorpe
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 07/18] PCI/P2PDMA: Document the Address Type assumption Leon Romanovsky
2026-08-21 19:43   ` sashiko-bot
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 08/18] PCI: Account for Direct Translated P2P in ACS isolation checks Leon Romanovsky
2026-08-21 19:54   ` sashiko-bot
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-25 15:59   ` Logan Gunthorpe
2026-08-21 19:38 ` [PATCH v4 09/18] PCI: Add ACS egress control vector accessor Leon Romanovsky
2026-08-21 19:50   ` sashiko-bot
2026-08-21 19:38 ` [PATCH v4 10/18] PCI: Account for ACS egress control in isolation checks Leon Romanovsky
2026-08-21 19:51   ` sashiko-bot
2026-08-24 23:22   ` Jason Gunthorpe
2026-08-30  9:20     ` Leon Romanovsky
2026-08-31 12:02       ` Jason Gunthorpe
2026-08-21 19:38 ` [PATCH v4 11/18] PCI/P2PDMA: Derive peer-to-peer routing from ACS control bits Leon Romanovsky
2026-08-21 19:54   ` sashiko-bot
2026-08-22 13:31     ` Leon Romanovsky
2026-08-25 19:17   ` Logan Gunthorpe
2026-08-21 19:38 ` [PATCH v4 12/18] PCI/P2PDMA: Honor ACS egress control vectors Leon Romanovsky
2026-08-21 19:56   ` sashiko-bot
2026-08-25 19:25   ` Logan Gunthorpe
2026-08-21 19:38 ` [PATCH v4 13/18] PCI/P2PDMA: Document ACS egress control handling Leon Romanovsky
2026-08-21 19:44   ` sashiko-bot
2026-08-25 19:52   ` Logan Gunthorpe
2026-08-21 19:38 ` [PATCH v4 14/18] PCI/P2PDMA: Extract pure ACS routing decision helpers Leon Romanovsky
2026-08-21 19:49   ` sashiko-bot
2026-08-25 19:55   ` Logan Gunthorpe
2026-08-21 19:38 ` [PATCH v4 15/18] PCI/P2PDMA: Add KUnit tests for ACS routing decisions Leon Romanovsky
2026-08-21 19:50   ` sashiko-bot
2026-08-21 19:38 ` [PATCH v4 16/18] PCI/P2PDMA: Add KUnit coverage for the ACS P2P routing walk Leon Romanovsky
2026-08-21 19:51   ` sashiko-bot
2026-08-21 19:38 ` [PATCH v4 17/18] PCI: Add KUnit coverage for ACS isolation checks Leon Romanovsky
2026-08-21 19:52   ` sashiko-bot
2026-08-21 19:38 ` [PATCH v4 18/18] PCI/P2PDMA: Log detailed ACS routing diagnostics Leon Romanovsky
2026-08-21 20:02   ` sashiko-bot
2026-08-22 13:28     ` Leon Romanovsky
2026-08-25 20:02   ` Logan Gunthorpe
2026-08-30  8:37     ` Leon Romanovsky [this message]
2026-08-24 23:22 ` [PATCH v4 00/18] PCI/P2PDMA: Fix ACS egress control handling Jason Gunthorpe
2026-08-30  9:02   ` Leon Romanovsky
2026-08-31 12:00     ` Jason Gunthorpe

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