thunderbolt-ibverbs: We have InfiniBand at home

74 pointsposted 2 days ago
by zdw

3 Comments

l1k

2 hours ago

This is using Thunderbolt networking as transport, which incurs a bit of overhead.

But starting with the upcoming Linux v7.2, there's a new feature called USB4STREAM to use raw Thunderbolt packets as transport with minimum overhead and a super simple user interface:

https://lore.kernel.org/r/20260511102744.1867485-1-mika.west...

Release of v7.2-rc1 is predicted for Jul 5, that's when this will first be available as a tarball. Until then you have to clone from thunderbolt.git/next:

https://git.kernel.org/pub/scm/linux/kernel/git/westeri/thun...

Or alternatively linux-next:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-n...

Press coverage:

https://www.phoronix.com/news/Intel-Linux-USB4STREAM

eqvinox

3 minutes ago

> This is using Thunderbolt networking as transport,

Are you sure? It doesn't sound like it in some places in the text, e.g.:

>> a kernel driver that sits alongside thunderbolt-net, allocating DMA rings from the controller's NHI port in the same way

but I don't have the domain knowledge to tell…

mkesper

5 hours ago

Kudos for the idea and being fully open to the state of this project (AI code, expect breakage)!