linux-kernel - Re: [PATCH v9 07/13] block: Add PCI P2P flag for request queue and check support for requests

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Message-ID: <20181005070913.GD23761@lst.de>
Date:   Fri, 5 Oct 2018 09:09:13 +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,
        linux-nvdimm@...ts.01.org, linux-block@...r.kernel.org,
        Stephen Bates <sbates@...thlin.com>,
        Christoph Hellwig <hch@....de>,
        Keith Busch <keith.busch@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Christian König <christian.koenig@....com>,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH v9 07/13] block: Add PCI P2P flag for request queue and
 check support for requests

On Thu, Oct 04, 2018 at 03:27:41PM -0600, Logan Gunthorpe wrote:
> QUEUE_FLAG_PCI_P2P is introduced meaning a driver's request queue
> supports targeting P2P memory. This will be used by P2P providers and
> orchestrators (in subsequent patches) to ensure block devices can
> support P2P memory before submitting P2P backed pages to submit_bio().
> 
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>

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