linux-kernel - Re: [PATCH net-next V2 0/3] XDP support for tap

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Message-Id: <20170813.195649.1320361489777509765.davem@davemloft.net>
Date:   Sun, 13 Aug 2017 19:56:49 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     mst@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kubakici@...pl
Subject: Re: [PATCH net-next V2 0/3] XDP support for tap

From: Jason Wang <jasowang@...hat.com>
Date: Fri, 11 Aug 2017 19:41:15 +0800

> Hi all:
> 
> This series tries to implement XDP support for tap. Two path were
> implemented:
> 
> - fast path: small & non-gso packet, For performance reason we do it
>   at page level and use build_skb() to create skb if necessary.
> - slow path: big or gso packet, we don't want to lose the capability
>   compared to generic XDP, so we export some generic xdp helpers and
>   do it after skb was created.
> 
> xdp1 shows about 41% improvement, xdp_redirect shows about 60%
> improvement.
> 
> Changes from V1:
> - fix the race between xdp set and free
> - don't hold extra refcount
> - add XDP_REDIRECT support
> 
> Please review.

Series applied, thanks Jason.