linux-kernel - Re: [PATCH v8 10/13] nvme-pci: Add support for P2P memory in requests

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Message-ID: <20180927171038.GD19589@localhost.localdomain>
Date:   Thu, 27 Sep 2018 11:10:38 -0600
From:   Keith Busch <keith.busch@...ux.intel.com>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-rdma@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>,
        Christian König <christian.koenig@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v8 10/13] nvme-pci: Add support for P2P memory in requests

On Thu, Sep 27, 2018 at 10:54:17AM -0600, Logan Gunthorpe wrote:
> For P2P requests, we must use the pci_p2pmem_map_sg() function
> instead of the dma_map_sg functions.
> 
> With that, we can then indicate PCI_P2P support in the request queue.
> For this, we create an NVME_F_PCI_P2P flag which tells the core to
> set QUEUE_FLAG_PCI_P2P in the request queue.
> 
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
> Reviewed-by: Christoph Hellwig <hch@....de>

Looks good to me as well.

Reviewed-by: Keith Busch <keith.busch@...el.com>