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From: "Björn Töpel" <>
To: "Junsong Zhao (junszhao)" <>,
	"" <>
Cc: "" <>
Subject: Re: questions about AF_PACKET V4 and AF_XDP
Date: Thu, 6 Jun 2019 09:47:15 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 2019-06-05 19:56, Junsong Zhao (junszhao) wrote:
> Hi Magnus and Bjorn,
> I saw your articles and presentation about AF_PACKET V4. It is exciting 
> to know that the kernel socket can have 40G throughput.
> But it seems the code is not in the 4.19 or 5.1 kernel. Instead there is 
> a new feature AF_XDP in 4.19 kernel and it is kind of similar to 
> Can you clarify if AF_XDP is the successor of AF_PACKET V4? Apart from 
> i40e driver, is there any other driver that supports the feature?

AF_PACKET v4 never made it to mainland, instead AF_XDP took that place.

Drivers with zero-copy support are i40e, ixgbe, and soon mlx5 and ice.

There's an LWN article on AF_XDP here:


> Here is the link to the article:
> Regards,
> Junsong Zhao
> Tech Lead
> Stealthwatch
> Mobile: +1-410-530-1036

           reply	other threads:[~2019-06-06  7:47 UTC|newest]

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