From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [net-next 02/16] ixgbe: fix spinlock recursion with netpoll
 and busy poll
Date: Fri, 14 Mar 2014 17:53:07 -0400 (EDT)
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From: "Tantilov, Emil S" <emil.s.tantilov@intel.com>
Date: Fri, 14 Mar 2014 20:40:25 +0000

> I noticed Eric's patches and this is obviously the better way to
> deal with it, but once the netpoll_rx patches are accepted will they
> make it into previous stable releases? Currently kernels between
> 3.11 and 3.13 (assuming Eric's changes make it into 3.14) will hang
> when netpoll and busy poll are used together.

This is very likely.

And in any event, solving it only in specific drivers is not the way
to go about things.