From: "Stephen Bates" <sbates@raithlin.com>
To: Sagi Grimberg <sagi@grimberg.me>,
Logan Gunthorpe <logang@deltatee.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>
Cc: "Christoph Hellwig" <hch@lst.de>, "Jens Axboe" <axboe@kernel.dk>,
"Keith Busch" <keith.busch@intel.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Jason Gunthorpe" <jgg@mellanox.com>,
"Max Gurtovoy" <maxg@mellanox.com>,
"Dan Williams" <dan.j.williams@intel.com>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [PATCH v2 08/10] nvme-pci: Add support for P2P memory in requests
Date: Thu, 1 Mar 2018 15:58:40 +0000 [thread overview]
Message-ID: <1CE68E79-E5FD-4EE2-BD88-B3EE57E43ACE@raithlin.com> (raw)
In-Reply-To: <c6639530-48ba-4655-c772-7d88a030e37e@grimberg.me>
> Any plans adding the capability to nvme-rdma? Should be
> straight-forward... In theory, the use-case would be rdma backend
> fabric behind. Shouldn't be hard to test either...
Nice idea Sagi. Yes we have been starting to look at that. Though again we would probably want to impose the "attached to the same PCIe switch" rule which might be less common to satisfy in initiator systems.
Down the road I would also like to discuss the best way to use this P2P framework to facilitate copies between NVMe namespaces (on both PCIe and fabric attached namespaces) without having to expose the CMB up to user space. Wasn't something like that done in the SCSI world at some point Martin?
Stephen
next prev parent reply other threads:[~2018-03-01 15:58 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-28 23:39 [PATCH v2 00/10] Copy Offload in NVMe Fabrics with P2P PCI Memory Logan Gunthorpe
2018-02-28 23:39 ` [PATCH v2 01/10] PCI/P2PDMA: Support peer to peer memory Logan Gunthorpe
2018-03-01 17:37 ` Bjorn Helgaas
2018-03-01 18:55 ` Logan Gunthorpe
2018-03-01 23:00 ` Bjorn Helgaas
2018-03-01 23:06 ` Logan Gunthorpe
2018-03-01 23:14 ` Stephen Bates
2018-03-01 23:45 ` Bjorn Helgaas
2018-02-28 23:39 ` [PATCH v2 02/10] PCI/P2PDMA: Add sysfs group to display p2pmem stats Logan Gunthorpe
2018-03-01 17:44 ` Bjorn Helgaas
2018-03-02 0:15 ` Logan Gunthorpe
2018-03-02 0:36 ` Dan Williams
2018-03-02 0:37 ` Logan Gunthorpe
2018-02-28 23:39 ` [PATCH v2 03/10] PCI/P2PDMA: Add PCI p2pmem dma mappings to adjust the bus offset Logan Gunthorpe
2018-03-01 17:49 ` Bjorn Helgaas
2018-03-01 19:36 ` Logan Gunthorpe
2018-02-28 23:40 ` [PATCH v2 04/10] PCI/P2PDMA: Clear ACS P2P flags for all devices behind switches Logan Gunthorpe
2018-03-01 18:02 ` Bjorn Helgaas
2018-03-01 18:54 ` Stephen Bates
2018-03-01 21:21 ` Alex Williamson
2018-03-01 21:26 ` Logan Gunthorpe
2018-03-01 21:32 ` Stephen Bates
2018-03-01 21:35 ` Jerome Glisse
2018-03-01 21:37 ` Logan Gunthorpe
2018-03-01 23:15 ` Bjorn Helgaas
2018-03-01 23:59 ` Logan Gunthorpe
2018-03-01 19:13 ` Logan Gunthorpe
2018-03-05 22:28 ` Bjorn Helgaas
2018-03-05 23:01 ` Logan Gunthorpe
2018-02-28 23:40 ` [PATCH v2 05/10] block: Introduce PCI P2P flags for request and request queue Logan Gunthorpe
2018-03-01 11:08 ` Sagi Grimberg
2018-02-28 23:40 ` [PATCH v2 06/10] IB/core: Add optional PCI P2P flag to rdma_rw_ctx_[init|destroy]() Logan Gunthorpe
2018-03-01 10:32 ` Sagi Grimberg
2018-03-01 17:16 ` Logan Gunthorpe
2018-02-28 23:40 ` [PATCH v2 07/10] nvme-pci: Use PCI p2pmem subsystem to manage the CMB Logan Gunthorpe
2018-03-05 1:33 ` Oliver
2018-03-05 16:00 ` Keith Busch
2018-03-05 17:10 ` Logan Gunthorpe
2018-03-05 18:02 ` Sinan Kaya
2018-03-05 18:09 ` Logan Gunthorpe
2018-03-06 0:49 ` Oliver
2018-03-06 1:14 ` Logan Gunthorpe
2018-03-06 10:40 ` Oliver
2018-03-05 19:57 ` Sagi Grimberg
2018-03-05 20:10 ` Jason Gunthorpe
2018-03-05 20:16 ` Logan Gunthorpe
2018-03-05 20:42 ` Keith Busch
2018-03-05 20:50 ` Jason Gunthorpe
2018-03-05 20:13 ` Logan Gunthorpe
2018-02-28 23:40 ` [PATCH v2 08/10] nvme-pci: Add support for P2P memory in requests Logan Gunthorpe
2018-03-01 11:07 ` Sagi Grimberg
2018-03-01 15:58 ` Stephen Bates [this message]
2018-03-09 5:08 ` Bart Van Assche
2018-02-28 23:40 ` [PATCH v2 09/10] nvme-pci: Add a quirk for a pseudo CMB Logan Gunthorpe
2018-03-01 11:03 ` Sagi Grimberg
2018-02-28 23:40 ` [PATCH v2 10/10] nvmet: Optionally use PCI P2P memory Logan Gunthorpe
2018-03-01 11:03 ` Sagi Grimberg
2018-03-01 16:15 ` Stephen Bates
2018-03-01 17:40 ` Logan Gunthorpe
2018-03-01 18:35 ` Sagi Grimberg
2018-03-01 18:42 ` Jason Gunthorpe
2018-03-01 19:01 ` Stephen Bates
2018-03-01 19:27 ` Logan Gunthorpe
2018-03-01 22:45 ` Jason Gunthorpe
2018-03-01 22:56 ` Logan Gunthorpe
2018-03-01 23:00 ` Stephen Bates
2018-03-01 23:20 ` Jason Gunthorpe
2018-03-01 23:29 ` Logan Gunthorpe
2018-03-01 23:32 ` Stephen Bates
2018-03-01 23:49 ` Keith Busch
2018-03-01 23:52 ` Logan Gunthorpe
2018-03-01 23:53 ` Stephen Bates
2018-03-02 15:53 ` Christoph Hellwig
2018-03-02 20:51 ` Stephen Bates
2018-03-01 23:57 ` Stephen Bates
2018-03-02 0:03 ` Logan Gunthorpe
2018-03-02 16:18 ` Jason Gunthorpe
2018-03-02 17:10 ` Logan Gunthorpe
2018-03-01 19:10 ` Logan Gunthorpe
2018-03-01 3:54 ` [PATCH v2 00/10] Copy Offload in NVMe Fabrics with P2P PCI Memory Benjamin Herrenschmidt
2018-03-01 3:56 ` Benjamin Herrenschmidt
2018-03-01 18:04 ` Logan Gunthorpe
2018-03-01 20:29 ` Benjamin Herrenschmidt
2018-03-01 20:55 ` Jerome Glisse
2018-03-01 21:03 ` Logan Gunthorpe
2018-03-01 21:10 ` Jerome Glisse
2018-03-01 21:15 ` Logan Gunthorpe
2018-03-01 21:25 ` Jerome Glisse
2018-03-01 21:37 ` Stephen Bates
2018-03-02 21:38 ` Stephen Bates
2018-03-02 22:09 ` Jerome Glisse
2018-03-05 20:36 ` Stephen Bates
2018-03-01 20:55 ` Logan Gunthorpe
2018-03-01 18:09 ` Stephen Bates
2018-03-01 20:32 ` Benjamin Herrenschmidt
2018-03-01 19:21 ` Dan Williams
2018-03-01 19:30 ` Logan Gunthorpe
2018-03-01 20:34 ` Benjamin Herrenschmidt
2018-03-01 20:40 ` Benjamin Herrenschmidt
2018-03-01 20:53 ` Jason Gunthorpe
2018-03-01 20:57 ` Logan Gunthorpe
2018-03-01 22:06 ` Benjamin Herrenschmidt
2018-03-01 22:31 ` Linus Torvalds
2018-03-01 22:34 ` Benjamin Herrenschmidt
2018-03-02 16:22 ` Kani, Toshi
2018-03-02 16:57 ` Linus Torvalds
2018-03-02 17:34 ` Linus Torvalds
2018-03-02 17:38 ` Kani, Toshi
2018-03-01 21:37 ` Dan Williams
2018-03-01 21:45 ` Logan Gunthorpe
2018-03-01 21:57 ` Logan Gunthorpe
2018-03-01 23:00 ` Benjamin Herrenschmidt
2018-03-01 23:19 ` Logan Gunthorpe
2018-03-01 23:25 ` Benjamin Herrenschmidt
2018-03-02 21:44 ` Benjamin Herrenschmidt
2018-03-02 22:24 ` Logan Gunthorpe
2018-03-01 23:26 ` Benjamin Herrenschmidt
2018-03-01 23:54 ` Logan Gunthorpe
2018-03-01 21:03 ` Benjamin Herrenschmidt
2018-03-01 21:11 ` Logan Gunthorpe
2018-03-01 21:18 ` Jerome Glisse
2018-03-01 21:22 ` Logan Gunthorpe
2018-03-01 10:31 ` Sagi Grimberg
2018-03-01 19:33 ` Logan Gunthorpe
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