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

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Date:	Wed, 16 Jul 2014 10:44:46 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	rusty@...tcorp.com.au, mst@...hat.com,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Vlad Yasevich <vyasevic@...hat.com>
Subject: Re: [PATCH net-next] virtio-net: rx busy polling support

On 07/15/2014 06:21 PM, Eric Dumazet wrote:
> 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.

Ok.
> 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.

Sure, will split this patch into smaller ones in V2.

Thanks
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