netdev - Re: [PATCH 2.6.35] bonding: prevent netpoll over bonded interfaces

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Message-Id: <20100628.235444.241924787.davem@davemloft.net>
Date:	Mon, 28 Jun 2010 23:54:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	andy@...yhouse.net
Cc:	netdev@...r.kernel.org, amwang@...hat.com, fubar@...ibm.com
Subject: Re: [PATCH 2.6.35] bonding: prevent netpoll over bonded interfaces

From: Andy Gospodarek <andy@...yhouse.net>
Date: Fri, 25 Jun 2010 15:50:44 -0400

> 
> Support for netpoll over bonded interfaces was added here:
> 
> 	commit f6dc31a85cd46a959bdd987adad14c3b645e03c1
> 	Author: WANG Cong <amwang@...hat.com>
> 	Date:   Thu May 6 00:48:51 2010 -0700
> 
> 	    bonding: make bonding support netpoll
> 
> but it is bad enough that we should probably just disable netpoll over
> bonding until some of the locking logic in the bonding driver is changed
> or converted completely to RCU.  Simple actions like changing the active
> slave in active-backup mode will hang the box if a high enough printk
> debugging level is enabled.
> 
> Keeping the old code around will be good for anyone that wants to work
> on it (and for after the RCU conversion), so I propose this small patch
> rather than ripping it all out.
> 
> Signed-off-by: Andy Gospodarek <andy@...yhouse.net>

Applied, thanks a lot Andy.
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