Partial kernel bypass merged into netmap main

The text discusses a new feature in netmap, a kernel module that improves network performance by allowing direct access to NIC queues. Previously, all queues had to be detached from the host network stack for netmap mode to work. However, with the introduction of single-rx-queue mode, users can now partially put a network adapter in netmap mode, leaving some queues attached to the host stack. This feature is useful for specific use cases where only RX rings are needed without their TX counterparts. The text also provides instructions on how to build and test this new feature under Linux using the ixgbe driver.

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