netdev - Re: [PATCH net v3 2/3] xen-netback: don't stop dealloc kthread too early

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Date:	Mon, 11 Aug 2014 16:16:51 +0100
From:	Wei Liu <wei.liu2@...rix.com>
To:	Zoltan Kiss <zoltan.kiss@...rix.com>
CC:	Wei Liu <wei.liu2@...rix.com>, <xen-devel@...ts.xen.org>,
	<netdev@...r.kernel.org>, <ian.campbell@...rix.com>
Subject: Re: [PATCH net v3 2/3] xen-netback: don't stop dealloc kthread too
 early

On Mon, Aug 11, 2014 at 03:55:08PM +0100, Zoltan Kiss wrote:
> On 11/08/14 11:11, Wei Liu wrote:
> >@@ -1525,10 +1537,13 @@ static int xenvif_handle_frag_list(struct xenvif_queue *queue, struct sk_buff *s
> >  	/* remove traces of mapped pages and frag_list */
> >  	skb_frag_list_init(skb);
> >  	uarg = skb_shinfo(skb)->destructor_arg;
> >+	/* See comment on set_skb_zerocopy */
> >+	if (uarg->callback == xenvif_zerocopy_callback)
> This condition is not necessary: uarg->callback shouldn't be anything else
> but this xenvif_zerocopy_callback at this point, unless something terribly
> went wrong. In that case we are doomed anyway :)
> 

Right. I was just too cautious.

Wei.
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