netdev - Re: [PATCHv3 net-next 3/4] caif: Add support for flow-control on device's tx-queue

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Message-Id: <20111205.184619.2049555377796266031.davem@davemloft.net>
Date:	Mon, 05 Dec 2011 18:46:19 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	sjur.brandeland@...ricsson.com
Cc:	netdev@...r.kernel.org, alexey.orishko@...ricsson.com,
	eric.dumazet@...il.com
Subject: Re: [PATCHv3 net-next 3/4] caif: Add support for flow-control on
 device's tx-queue

From: Sjur Brændeland <sjur.brandeland@...ricsson.com>
Date: Sun,  4 Dec 2011 22:22:54 +0100

> Flow control is implemented by inspecting the qdisc queue length
> in order to detect potential overflow on the TX queue. When a threshold
> is reached flow-off is sent upwards in the CAIF stack. At the same time
> the skb->destructor is hi-jacked by orphaning the SKB and the original
> destructor is replaced with a "flow-on" callback. When the "hi-jacked"
> SKB is consumed the queue should be empty, and the "flow-on" callback
> is called and xon is sent upwards in the CAIF stack.
> 
> Signed-off-by: Sjur Brændeland <sjur.brandeland@...ricsson.com>

Applied.
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