Rusty Russell wrote:
In this episode, Rusty tries to NAPI-ize the driver and discovers that virtio callbacks are a bad idea: NAPI needs to turn interrupts off and still be able to query for new incoming packets. Changes to core: 1) Back to "interrupt" model with get_inbuf()/get_outbuf() calls.
Seems to be these are just two different ways of iterating over the pending buffers, and one could be implemented in terms of the other in a few lines. I think that new new way is better, though, due to less indirection.
btw, I'm not sure that the name 'virtio' is correct. Probably any network or block driver which has support for batching (the vast majority) could use this to good effect.
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