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We cannot RDMA into a GPU's shared memory.

This story is from 2026-08-20. It is preserved in the archive; the latest stories are on the live feed.

And that limitation turns out to explain why disaggregated inference is harder than the press releases suggest. A network can only write into one rung of any memory hierarchy: the one that's globally addressable. On a CPU that's DRAM. On a GPU that's HBM. Not L1, not SMEM, not tensor memory. NIXL (…

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  1. 2026-08-20 23:53 · r/learnmachinelearning
    We cannot RDMA into a GPU's shared memory.

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