netdev - Re: Stable regression with 'tcp: allow splice() to build full TSO packets'

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Message-ID: <1337273387.3403.24.camel@edumazet-glaptop>
Date:	Thu, 17 May 2012 18:49:47 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	netdev@...r.kernel.org
Subject: Re: Stable regression with 'tcp: allow splice() to build full TSO
 packets'

On Thu, 2012-05-17 at 18:40 +0200, Willy Tarreau wrote:
>  try to port your patch (8d4057 tg3: provide frags as skb head) to
> mv643xx_eth as an exercise. If I succeed and notice an improvement, I'll
> send a patch :-)


tg3 uses build_skb(), thats an API that allocates the skb after frame is
filled by the device, to have less cache misses in RX path.

But for most devices, netdev_alloc_skb() would be more than enough.

I'll send a patch once tested.

Thanks


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