linux-kernel - Re: [PATCH net-next v6 1/10] xen-netback: Use skb->cb for pending

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Message-ID: <20140305121637.GF19620@zion.uk.xensource.com>
Date:	Wed, 5 Mar 2014 12:16:37 +0000
From:	Wei Liu <wei.liu2@...rix.com>
To:	Zoltan Kiss <zoltan.kiss@...rix.com>
CC:	<ian.campbell@...rix.com>, <wei.liu2@...rix.com>,
	<xen-devel@...ts.xenproject.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <jonathan.davies@...rix.com>
Subject: Re: [PATCH net-next v6 1/10] xen-netback: Use skb->cb for pending_idx

On Tue, Mar 04, 2014 at 10:32:12PM +0000, Zoltan Kiss wrote:
> Storing the pending_idx at the first byte of the linear buffer never looked
> good, skb->cb is a more proper place for this. It also prevents the header to
> be directly grant copied there, and we don't have the pending_idx after we
> copied the header here, so it's time to change it.
> 

I think this is a valid change. But I would like you to define a
skb_cb_overlay just like the receive path does.

You can rename skb_cb_overlay in current code to skb_cb_overlay_rx and
add your skb_cb_overlay_tx.

Wei.
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