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A comment on Linux: IO without entering the kernel. Parent comment

Re:Linux: IO without entering the kernel by lima on Sunday December 16, 2018 @08:54AM (#18693039)
This is basically how the entirety of DPDK using a poll-mode driver works. Each worker thread is doing busy polling on a shared memory segment, ensuring minimal packet processing latency.
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Re:Linux: IO without entering the kernel by gpderetta on Sunday December 16, 2018 @11:18AM (#18693676)
This is a bit different though. DPDK completely bypasses the kernel and userspace directly talks with the network adapter.

I think this is mostly for disk I/O and the userspace component still communicates with the kernel that controls the hardware and performs permission checks.

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Re:Linux: IO without entering the kernel by freebsd4me on Sunday December 16, 2018 @11:35AM (#18693758)
So it’s like netmap for disk.
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