[PATCH net-next] virtio-net: rx busy polling support

Eric Dumazet
Tue, 15 Jul 2014 10:21:43 -0000

On Tue, 2014-07-15 at 17:41 +0800, Jason Wang wrote:
> Add basic support for rx busy polling.
>
> 1 byte netperf tcp_rr on mlx4 shows 116% improvement: the transaction
> rate was increased from 9151.94 to 19787.37.

This is a misleading changelog.

You forgot to describe how you allowed busy polling, as it is not
'automatic'

If not, this patch adds two spinlock/unlock pairs in fast path.

Also, it looks like you could split this in smaller patches.

virtnet_napi_disable_all() & virtnet_napi_enable_all() could be added in
a separate patch for example.