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Date:   Thu, 5 Nov 2020 18:43:06 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Jason Gunthorpe <jgg@ziepe.ca>
Cc:     Christoph Hellwig <hch@lst.de>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Bernard Metzler <bmt@zurich.ibm.com>,
        Zhu Yanjun <yanjunz@nvidia.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
        Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>,
        linux-rdma@vger.kernel.org, linux-pci@vger.kernel.org,
        iommu@lists.linux-foundation.org
Subject: Re: [PATCH 4/6] PCI/P2PDMA: Remove the DMA_VIRT_OPS hacks
Message-ID: <20201105174306.GA10757@lst.de>
References: <20201105074205.1690638-1-hch@lst.de> <20201105074205.1690638-5-hch@lst.de> <20201105143418.GA4142106@ziepe.ca> <20201105170816.GC7502@lst.de> <20201105172357.GE36674@ziepe.ca> <20201105172921.GA9537@lst.de> <20201105173930.GF36674@ziepe.ca>
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On Thu, Nov 05, 2020 at 01:39:30PM -0400, Jason Gunthorpe wrote:
> Hmm. This works for real devices like mlx5, but it means the three SW
> devices will also resolve to a real PCI device that is not the DMA
> device.

Does it?  When I followed the links on my system rxe was a virtual
device without a physical parent.  Weird.