Why no zero-copy networking in linux kernel? [closed]

Answer 1

There are a few options nowadays for zero-copy networking:

• PF_RING ZC (Zero Copy).
• Linux native zero-copy TCP.
• Intel Data Plane Development Kit.
• OpenOnload for proprietary hardware.

Note, that zero-copy with TCP may be inconvenient, because TCP segments carry headers and payload, but applications are only concerned with payload, so that payload but not headers must be copied into a contiguous buffer for your application.