netdev - Re: [PATCH V3] xen/netfront: handle compound page fragments on transmit

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Message-ID: <1353510832.2590.39.camel@edumazet-glaptop>
Date:	Wed, 21 Nov 2012 07:13:52 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ian Campbell <ian.campbell@...rix.com>
Cc:	netdev@...r.kernel.org, xen-devel@...ts.xen.org,
	Eric Dumazet <edumazet@...gle.com>,
	Konrad Rzeszutek Wilk <konrad@...nel.org>,
	ANNIE LI <annie.li@...cle.com>,
	Sander Eikelenboom <linux@...elenboom.it>,
	Stefan Bader <stefan.bader@...onical.com>
Subject: Re: [PATCH V3] xen/netfront: handle compound page fragments on
 transmit

On Wed, 2012-11-21 at 12:02 +0000, Ian Campbell wrote:
> An SKB paged fragment can consist of a compound page with order > 0.
> However the netchannel protocol deals only in PAGE_SIZE frames.
> 
> Handle this in xennet_make_frags by iterating over the frames which
> make up the page.
> 
> This is the netfront equivalent to 6a8ed462f16b for netback.
> 
> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
> Cc: netdev@...r.kernel.org
> Cc: xen-devel@...ts.xen.org
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Konrad Rzeszutek Wilk <konrad@...nel.org>
> Cc: ANNIE LI <annie.li@...cle.com>
> Cc: Sander Eikelenboom <linux@...elenboom.it>
> Cc: Stefan Bader <stefan.bader@...onical.com>
> ---
> v3: limit to 80-characters. Use net_alert_ratelimited.
> v2: check we have enough room in the ring and that the other end can
>     cope with the number of slots in a single frame
> ---

Acked-by: Eric Dumazet <edumazet@...gle.com>



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