From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [RFC PATCH v7 08/19] Make __alloc_skb() to get external buffer.
Date: Sat, 05 Jun 2010 16:53:24 +0200
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Cc: netdev@vger.kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu,
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To: xiaohui.xin@intel.com
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Le samedi 05 juin 2010 =C3=A0 18:14 +0800, xiaohui.xin@intel.com a =C3=A9=
crit :
> From: Xin Xiaohui <xiaohui.xin@intel.com>
> 	child->fclone =3D SKB_FCLONE_UNAVAILABLE;
>  	}
> +	/* Record the external buffer info in this field. It's not so good,
> +	 * but we cannot find another place easily.
> +	 */
> +	shinfo->destructor_arg =3D ext_page;
> +


Yes this is a big problem, its basically using a cache line that was no=
t
touched before.