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From: Johannes Berg <johannes@sipsolutions.net>
Subject: Re: [PATCH 1/2] genl: Fix genl dumpit() locking.
Date: Thu, 22 Aug 2013 20:18:54 +0200
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Cc: netdev <netdev@vger.kernel.org>, Jesse Gross <jesse@nicira.com>
To: Pravin Shelar <pshelar@nicira.com>
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On Thu, 2013-08-22 at 11:10 -0700, Pravin Shelar wrote:

> > By the way - why? This just means that netlink will allocate another
> > lock to lock it all, so it's not a very useful change?
> >
> This replaces global genl-lock with per-socket lock which allows
> parallel operation in parallel-genl-families and they are not blocked
> due to other unrelated genl-family operations.

I don't think so? It replaces the genl lock as cb_mutex with a per
*kernel* socket lock, so really just one per network namespace. That's
not much of an improvement really.

johannes