Router-sized 4096-entry rings on every port with GRO kept across
forwarding, the IOMMU in passthrough mode, and EEE pinned off on the
I226-V ports as one trigger for their link-drop erratum. The ring and
GRO settings are .link files, so they land on a device add event rather
than at switch time.
Also document the tuning deliberately not done -- coalescing and PCIe
ASPM -- and what measuring the NICs' ESP offload found, since the
esp4_offload modules are software batching and easy to mistake for it.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
jackos1998
bf411e03e2