Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030296AbWHDCpx (ORCPT ); Thu, 3 Aug 2006 22:45:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030298AbWHDCpx (ORCPT ); Thu, 3 Aug 2006 22:45:53 -0400 Received: from smtp.osdl.org ([65.172.181.4]:54729 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1030296AbWHDCpw (ORCPT ); Thu, 3 Aug 2006 22:45:52 -0400 Date: Thu, 3 Aug 2006 19:45:50 -0700 From: Andrew Morton To: Auke Kok Cc: linux-kernel@vger.kernel.org, jesse.brandeburg@intel.com, john.ronciak@intel.com, auke-jan.h.kok@intel.com, netdev@vger.kernel.org, arjan@linux.intel.com Subject: Re: [RFC] irqbalance: Mark in-kernel irqbalance as obsolete, set to N by default Message-Id: <20060803194550.9ff31bc1.akpm@osdl.org> In-Reply-To: <44CE3F5E.4010305@intel.com> References: <44CE3F5E.4010305@intel.com> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.17; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 731 Lines: 16 On Mon, 31 Jul 2006 10:35:26 -0700 Auke Kok wrote: > We've recently seen a number of user bug reports against e1000 that the > in-kernel irqbalance code is detrimental to network latency. The algorithm > keeps swapping irq's for NICs from cpu to cpu causing extremely high network > latency (>1000ms). What kernel versions? Some IRQ balancer fixes went in shortly after 2.6.17. It would be better if poss to fix the balancer rather than deprecating it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/