From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] e1000e: Change wthresh to 1 to avoid possible Tx
 stalls.
Date: Wed, 06 Jun 2012 21:34:03 -0400 (EDT)
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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Wed, 06 Jun 2012 17:59:12 -0700

> This patch will cause unacceptable performance issues with non-ESB2
> parts.

You have to fix the regression a non-1 setting causes, performance
is secondary.