From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH] net: dev: fix the incorrect hold of net namespace's lo
 device
Date: Thu, 23 Aug 2012 05:13:09 +0200
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On Wed, 2012-08-22 at 10:39 +0200, Eric Dumazet wrote:

> rcu_barrier() at this place will kill some workloads.

For example, I tested the following one :

modprobe dummy numdummies=1000
time rmmod dummy

-> 16.5 seconds instead of 0.4 second