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Linux 5.4 To Support NVMe-of P2P Support With Compatible Systems

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  • Linux 5.4 To Support NVMe-of P2P Support With Compatible Systems

    Phoronix: Linux 5.4 To Support NVMe-of P2P Support With Compatible Systems

    Sent in and already landed on Monday were the PCI changes for Linux 5.4 and includes an interesting feature addition...

    http://www.phoronix.com/scan.php?pag...CI-NVMe-OF-P2P

  • #2
    Does it translate into a better IO experience on whitlisted platforms with NVMe devices?

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    • #3
      Originally posted by ms178 View Post
      Does it translate into a better IO experience on whitlisted platforms with NVMe devices?
      This is only relevant for peer-to-peer devices, so no benefit if say just having an NVMe device on your system.
      Michael Larabel
      http://www.michaellarabel.com/

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      • #4
        Originally posted by Michael View Post

        This is only relevant for peer-to-peer devices, so no benefit if say just having an NVMe device on your system.
        Thanks, I had the impression that this could potentially improve the GPU to NVMe SSD communication (withouth the roundtrip to the CPU).

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        • #5
          Although I definitely see the benefits of this, seems to me this is going to be a gargantuan security exploit down the road.

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          • #6
            Originally posted by schmidtbag View Post
            Although I definitely see the benefits of this, seems to me this is going to be a gargantuan security exploit down the road.
            What are you saying? It'll be just fine!

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            • #7
              It'd be interesting to see TLS offload in NICs, so that you could go a step further than sendfile: just tell the NVMe controller to stream some data to your NIC when you want to serve a static file.

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              • #8
                Originally posted by numacross View Post

                What are you saying? It'll be just fine!
                Intel is out of their fucking minds as usual.

                How can basically allowing DMA to a CPU cache without any sort of IOMMU be anywhere near sane from a security standpoint.

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                • #9
                  Originally posted by starshipeleven View Post
                  Intel is out of their fucking minds as usual.

                  How can basically allowing DMA to a CPU cache without any sort of IOMMU be anywhere near sane from a security standpoint.
                  But it's really, really fast!

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