linux-kernel - Re: [PATCH v3,1/1] net/hyperv: Add flow control based on hi/low watermark

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Message-Id: <20120403.174814.1643372599291158711.davem@davemloft.net>
Date:	Tue, 03 Apr 2012 17:48:14 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	haiyangz@...rosoft.com
Cc:	netdev@...r.kernel.org, kys@...rosoft.com, olaf@...fle.de,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org
Subject: Re: [PATCH v3,1/1] net/hyperv: Add flow control based on hi/low
 watermark

From: Haiyang Zhang <haiyangz@...rosoft.com>
Date: Tue, 27 Mar 2012 16:20:45 -0700

> In the existing code, we only stop queue when the ringbuffer is full,
> so the current packet has to be dropped or retried from upper layer.
> 
> This patch stops the tx queue when available ringbuffer is below
> the low watermark. So the ringbuffer still has small amount of space
> available for the current packet. This will reduce the overhead of
> retries on sending.
> 
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> Reviewed-by: K. Y. Srinivasan <kys@...rosoft.com>

Applied to net-next
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