netdev - Re: [RFC PATCH V2 5/5] Add TX zero copy in macvtap

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Message-ID: <1291998355.2167.53.camel@localhost.localdomain>
Date:	Fri, 10 Dec 2010 08:25:55 -0800
From:	Shirley Ma <mashirle@...ibm.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Avi Kivity <avi@...hat.com>, Arnd Bergmann <arnd@...db.de>,
	mst@...hat.com, xiaohui.xin@...el.com, netdev@...r.kernel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH V2 5/5] Add TX zero copy in macvtap

On Fri, 2010-12-10 at 11:27 +0100, Eric Dumazet wrote:
> You could make one atomic_add() outside of the loop, and factorize
> many
> things...
> 
> atomic_add(len, &skb->sk->sk_wmem_alloc);
> skb->data_len += len;
> skb->len += len;
> skb->truesize += len;
> while (len) {
>         ...
> } 

Yep, thanks, will update it!

Shirley

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