From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-2.6 PATCH 3/3] ixgbe: Fix RSC completion delay causing Rx interrupts to stop Date: Thu, 30 Jul 2009 19:29:13 -0700 (PDT) Message-ID: <20090730.192913.166256636.davem@davemloft.net> References: <20090730222501.26121.2952.stgit@localhost.localdomain> <20090730222559.26121.13496.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, peter.p.waskiewicz.jr@intel.com To: jeffrey.t.kirsher@intel.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:37773 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752798AbZGaC3F (ORCPT ); Thu, 30 Jul 2009 22:29:05 -0400 In-Reply-To: <20090730222559.26121.13496.stgit@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-ID: From: Jeff Kirsher Date: Thu, 30 Jul 2009 15:26:00 -0700 > When a user disables interrupt throttling with ethtool on 82599 devices, > the interrupt timer may not be re-enabled if hardware RSC is running. The > RSC completions in hardware don't complete before the next ITR event tries > to fire, so the ITR timer never gets re-armed. This patch increases the > amount of time between interrupts when throttling is disabled (rx-usecs = > 0) when the hardware RSC deature is enabled. > > Signed-off-by: Peter P Waskiewicz Jr > Signed-off-by: Jeff Kirsher Applied.