Re: [RFC 0/8] Copy Offload with Peer-to-Peer PCI Memory

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To: Dan Williams <dan.j.williams@xxxxxxxxx>, Jerome Glisse <jglisse@xxxxxxxxxx>
Subject: Re: [RFC 0/8] Copy Offload with Peer-to-Peer PCI Memory
From: "Stephen Bates" <sbates@xxxxxxxxxxxx>
Date: Thu, 20 Apr 2017 20:43:47 +0000
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Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>, Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Bjorn Helgaas <helgaas@xxxxxxxxxx>, "Christoph Hellwig" <hch@xxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>, Max Gurtovoy <maxg@xxxxxxxxxxxx>, Keith Busch <keith.busch@xxxxxxxxx>, "linux-pci@xxxxxxxxxxxxxxx" <linux-pci@xxxxxxxxxxxxxxx>, linux-scsi <linux-scsi@xxxxxxxxxxxxxxx>, "linux-nvme@xxxxxxxxxxxxxxxxxxx" <linux-nvme@xxxxxxxxxxxxxxxxxxx>, "linux-rdma@xxxxxxxxxxxxxxx" <linux-rdma@xxxxxxxxxxxxxxx>, linux-nvdimm <linux-nvdimm@xxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
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> Yes, this makes sense I think we really just want to distinguish host
> memory or not in terms of the dev_pagemap type.

I would like to see mutually exclusive flags for host memory (or not) and persistence (or not).

Stephen

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