linux-kernel - Re: [PATCH v3 11/14] PCI/P2PDMA: Store mapping method in an xarray

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Message-ID: <20190816081454.GK9249@lst.de>
Date:   Fri, 16 Aug 2019 10:14:54 +0200
From:   Christoph Hellwig <hch@....de>
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,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Christian Koenig <Christian.Koenig@....com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Dan Williams <dan.j.williams@...el.com>,
        Eric Pilmore <epilmore@...aio.com>,
        Stephen Bates <sbates@...thlin.com>
Subject: Re: [PATCH v3 11/14] PCI/P2PDMA: Store mapping method in an xarray

On Mon, Aug 12, 2019 at 11:30:45AM -0600, Logan Gunthorpe wrote:
> When upstream_bridge_distance() is called, store the method required to map
> the DMA transfers in an xarray so it can be looked up efficiently on the
> hot path in pci_p2pdma_map_sg().
> 
> Link: https://lore.kernel.org/r/20190730163545.4915-12-logang@deltatee.com
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>