From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-2.6 PATCH 4/6] e1000e: 82579 unaccounted missed packets Date: Wed, 22 Sep 2010 21:11:04 -0700 (PDT) Message-ID: <20100922.211104.98876899.davem@davemloft.net> References: <20100923031432.10976.81909.stgit@localhost.localdomain> <20100923031617.10976.68976.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, gospo@redhat.com, bphilips@novell.com, bruce.w.allan@intel.com To: jeffrey.t.kirsher@intel.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:40244 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751013Ab0IWEKo (ORCPT ); Thu, 23 Sep 2010 00:10:44 -0400 In-Reply-To: <20100923031617.10976.68976.stgit@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-ID: From: Jeff Kirsher Date: Wed, 22 Sep 2010 20:16:18 -0700 > From: Bruce Allan > > On 82579, there is a hardware bug that can cause received packets to not > get transferred from the PHY to the MAC due to K1 (a power saving feature > of the PHY-MAC interconnect similar to ASPM L1). Since the MAC controls > the accounting of missed packets, these will go unnoticed. Workaround the > issue by setting the K1 beacon duration according to the link speed. > > Signed-off-by: Bruce Allan > Tested-by: Jeff Pieper > Signed-off-by: Jeff Kirsher Applied.