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Re: Enabling peer to peer device transactions for PCIe devices

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On 05/12/16 12:46 PM, Jason Gunthorpe wrote:
> NVMe might have to deal with pci-e hot-unplug, which is a similar
> problem-class to the GPU case..

Sure, but if the NVMe device gets hot-unplugged it means that all the 
CMB mappings are useless and need to be torn down. This probably means 
killing any process that has mappings open.

> In any event the allocator still needs to track which regions are in
> use and be able to hook 'free' from userspace. That does suggest it
> should be integrated into the nvme driver and not a bolt on driver..

Yup, that's correct. And yes, I've never suggested this to be a bolt on 
driver -- I always expected for it to get integrated into the nvme 
driver. (iopmem was not meant for this.)

Logan

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Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-25 20:40 +0100
  Re: Enabling peer to peer device transactions for PCIe devices Christian König <deathsimple@vodafone.de> - 2016-11-25 21:50 +0100
    Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-25 22:20 +0100
  Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-28 18:00 +0100
    Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-11-28 19:30 +0100
      Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-11-28 22:40 +0100
        Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-28 23:30 +0100
    Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-28 20:10 +0100
      Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-11-30 17:30 +0100
        Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-11-30 19:10 +0100
          Re: Enabling peer to peer device transactions for PCIe devices "Stephen Bates" <sbates@raithlin.com> - 2016-12-04 14:10 +0100
          Re: Enabling peer to peer device transactions for PCIe devices "Stephen Bates" <sbates@raithlin.com> - 2016-12-04 14:50 +0100
            Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-05 18:20 +0100
              Re: Enabling peer to peer device transactions for PCIe devices Dan Williams <dan.j.williams@intel.com> - 2016-12-05 18:50 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Dan Williams <dan.j.williams@intel.com> - 2016-12-05 19:10 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-12-05 19:40 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Dan Williams <dan.j.williams@intel.com> - 2016-12-05 19:50 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-05 20:20 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-12-05 20:30 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-05 20:50 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-12-05 21:00 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Christoph Hellwig <hch@infradead.org> - 2016-12-05 21:10 +0100
                Re: Enabling peer to peer device transactions for PCIe devices "Stephen Bates" <sbates@raithlin.com> - 2016-12-06 09:30 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-06 17:40 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-12-06 18:00 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-06 18:30 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Logan Gunthorpe <logang@deltatee.com> - 2016-12-06 22:50 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Dan Williams <dan.j.williams@intel.com> - 2016-12-06 23:10 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Christoph Hellwig <hch@infradead.org> - 2016-12-06 18:20 +0100
                Re: Enabling peer to peer device transactions for PCIe devices Jason Gunthorpe <jgunthorpe@obsidianresearch.com> - 2016-12-05 19:10 +0100
      RE: Enabling peer to peer device transactions for PCIe devices "Deucher, Alexander" <Alexander.Deucher@amd.com> - 2016-11-30 18:50 +0100
    Re: Enabling peer to peer device transactions for PCIe devices Haggai Eran <haggaie@mellanox.com> - 2016-11-28 21:00 +0100
  Re: Enabling peer to peer device transactions for PCIe devices Haggai Eran <haggaie@mellanox.com> - 2016-11-28 19:40 +0100

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