netdev - Re: [PATCH] atl1c: dont use highprio tx queue

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Message-Id: <20120219.185956.2140542911171040902.davem@davemloft.net>
Date:	Sun, 19 Feb 2012 18:59:56 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	thomas@...3r.de, linux-kernel@...r.kernel.org, jcliburn@...il.com,
	chris.snook@...il.com, netdev@...r.kernel.org, jwboyer@...il.com
Subject: Re: [PATCH] atl1c: dont use highprio tx queue

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 16 Feb 2012 07:43:11 +0100

> This driver attempts to use two TX rings but lacks proper support :
> 
> 1) IRQ handler only takes care of TX completion on first TX ring
> 2) the stop/start logic uses the legacy functions (for non multiqueue
> drivers)
> 
> This means all packets witk skb mark set to 1 are sent through high
> queue but are never cleaned and queue eventualy fills and block the
> device, triggering the infamous "NETDEV WATCHDOG" message. 
> 
> Lets use a single TX ring to fix the problem, this driver is not a real
> multiqueue one yet.
> 
> Minimal fix for stable kernels.
> 
> Reported-by: Thomas Meyer <thomas@...3r.de>
> Tested-by: Thomas Meyer <thomas@...3r.de>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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