When set, this option causes the process to 'touch' the specified number of packet buffers when the Onload stack is created. This causes memory for the packet buffers to be pre-allocated, and also causes them to be memory-mapped into the process address space. This can prevent latency jitter caused by allocation and memory-mapping overheads.
The number of packets requested is in addition to the packet buffers that are allocated to fill the RX rings. There is no guarantee that it will be possible to allocate the number of packet buffers requested.
The default setting causes all packet buffers to be mapped into the user-level address space, but does not cause any extra buffers to be reserved. Set to
0 to prevent prefaulting.