netdev - Re: [PATCH 01/20] net: NETDEV_UNREGISTER_PERNET -> NETDEV_UNREGISTER

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Message-Id: <20091130.144917.233710214.davem@davemloft.net>
Date:	Mon, 30 Nov 2009 14:49:17 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	ebiederm@...ssion.com
Cc:	netdev@...r.kernel.org, hadi@...erus.ca, dlezcano@...ibm.com,
	adobriyan@...il.com, kaber@...sh.net, opurdila@...acom.com
Subject: Re: [PATCH 01/20] net: NETDEV_UNREGISTER_PERNET ->
 NETDEV_UNREGISTER_BATCH

From: "Eric W. Biederman" <ebiederm@...ssion.com>
Date: Sun, 29 Nov 2009 17:45:58 -0800

> Additionally it appears that we moved the route cache flush after
> the final synchronize_net, which seems wrong and there was no
> explanation.  So I have restored the original location of the final
> synchronize_net.

I think the idea was that it's important for all pending stale
RCU references to the device to be gone before we send out the
notifier.  And that's why the synchronize_net() comes first.

This needs more thought.
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