From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: Softirqs without captured packets
Date: Fri, 08 Feb 2013 14:57:28 -0500 (EST)
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From: Javier Domingo <javierdo1@gmail.com>
Date: Fri, 8 Feb 2013 20:54:14 +0100

> Just realized I didn't put the file:

Softirqs happen for TX packet reclaim, other miscelanneous networking
device events (link status changes, hw statistic overflows, etc.),
timers, etc.

They are not exclusively triggered for receive packets.