netdev - Re: [PATCH 1/2] bonding 802.3ad: Fix the state machine locking v2

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Message-Id: <20110307.160315.13736027.davem@davemloft.net>
Date:	Mon, 07 Mar 2011 16:03:15 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	nils.carlson@...csson.com
Cc:	fubar@...ibm.com, andy@...yhouse.net, netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] bonding 802.3ad: Fix the state machine locking v2

From: Nils Carlson <nils.carlson@...csson.com>
Date: Fri, 4 Mar 2011 09:09:11 +0100

> Changes since v1:
> * Clarify an unclear comment
> * Move a (possible) name change to a separate patch
> 
> The ad_rx_machine, ad_periodic_machine and ad_port_selection_logic
> functions all inspect and alter common fields within the port structure.
> Previous to this patch, only the ad_rx_machines were mutexed, and the
> periodic and port_selection could run unmutexed against an ad_rx_machine
> trigged by an arriving LACPDU.
> 
> This patch remedies the situation by protecting all the state machines
> from concurrency. This is accomplished by locking around all the state
> machines for a given port, which are executed at regular intervals; and
> the ad_rx_machine when handling an incoming LACPDU.
> 
> Signed-off-by: Nils Carlson <nils.carlson@...csson.com>

Applied.
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