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[107.191.0.22]) by smtp.gmail.com with ESMTPSA id z70-v6sm11859792pgd.64.2018.10.05.18.16.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 Oct 2018 18:16:07 -0700 (PDT) Subject: Re: [PATCH v9 07/13] block: Add PCI P2P flag for request queue and check support for requests To: Logan Gunthorpe , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org, linux-nvdimm@lists.01.org, linux-block@vger.kernel.org Cc: Stephen Bates , Christoph Hellwig , Keith Busch , Sagi Grimberg , Bjorn Helgaas , Jason Gunthorpe , Max Gurtovoy , Dan Williams , =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Benjamin Herrenschmidt , Alex Williamson , =?UTF-8?Q?Christian_K=c3=b6nig?= References: <20181004212747.6301-1-logang@deltatee.com> <20181004212747.6301-8-logang@deltatee.com> From: Jens Axboe Message-ID: <485de371-0e84-6f20-7f3b-cec5635b87fe@kernel.dk> Date: Fri, 5 Oct 2018 19:16:04 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0 MIME-Version: 1.0 In-Reply-To: <20181004212747.6301-8-logang@deltatee.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/4/18 3:27 PM, 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(). Nit pick, but the subject line still says that it checks support for requests. This patch just adds the ability to flag support in the queue. -- Jens Axboe