Subject: Re: [PATCH RFC] tun: experimental zero copy tx support

From: Stephen Hemminger <[email-masked]>
Date: Mon, 14 May 2012 09:54:46 -0700

On Sun, 13 May 2012 18:52:06 +0300
"Michael S. Tsirkin" <[email-masked]> wrote:

> +		/* Userspace may produce vectors with count greater than
> +		 * MAX_SKB_FRAGS, so we need to linearize parts of the skb
> +		 * to let the rest of data to be fit in the frags.
> +		 */
Rather than complex partial code, just go through slow path for
requests with too many frags (or for really small requests).
Creating mixed skb's seems too easy to get wrong.