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

[phoronix]

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?page=news_item&px=Linux-5.4-PCI-NVMe-OF-P2P

[ms178]

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

[Michael]

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.

[ms178]

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).

[schmidtbag]

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

[numacross]

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!

[microcode]

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.

[starshipeleven]

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.

[numacross]

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!