netdev - Re: [PATCH net-next-2.6] vlan: remove one synchronize

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Message-ID: <BANLkTikDXqQtOh4iM04Ek-CEwLHnZFrOiQ@mail.gmail.com>
Date:	Mon, 9 May 2011 10:30:25 -0700
From:	Jesse Gross <jesse@...ira.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Ben Greear <greearb@...delatech.com>,
	Patrick McHardy <kaber@...sh.net>,
	netdev <netdev@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Michał Mirosław <mirq-linux@...e.qmqm.pl>
Subject: Re: [PATCH net-next-2.6] vlan: remove one synchronize_net() call

On Mon, May 9, 2011 at 7:40 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> At VLAN dismantle phase, unregister_vlan_dev() makes one
> synchronize_net() call after vlan_group_set_device(grp, vlan_id, NULL).
>
> This call can be safely removed because we are calling
> unregister_netdevice_queue() to queue device for deletion, and this
> process needs at least one rcu grace period to complete.
>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> Cc: Ben Greear <greearb@...delatech.com>
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> Cc: Jesse Gross <jesse@...ira.com>
> Cc: Michał Mirosław <mirq-linux@...e.qmqm.pl>

Acked-by: Jesse Gross <jesse@...ira.com>
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