Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266362AbUIANDl (ORCPT ); Wed, 1 Sep 2004 09:03:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266425AbUIANDk (ORCPT ); Wed, 1 Sep 2004 09:03:40 -0400 Received: from mx2.elte.hu ([157.181.151.9]:38373 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S266362AbUIANDj (ORCPT ); Wed, 1 Sep 2004 09:03:39 -0400 Date: Wed, 1 Sep 2004 15:05:18 +0200 From: Ingo Molnar To: "P.O. Gaillard" Cc: linux-kernel Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 - netdev_max_back_log is too small Message-ID: <20040901130518.GA10060@elte.hu> References: <20040830192131.GA12249@elte.hu> <4135C12B.6050208@fr.thalesgroup.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4135C12B.6050208@fr.thalesgroup.com> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 724 Lines: 18 * P.O. Gaillard wrote: > I know that you have reduced netdev_max_back_log to 8 to reduce the > latency. But I think that you should know that I had to set it back to > 32 to avoid ethernet frame losses on a 3GHz P4 using e1000 > (eth0/threaded=1). could you try the -Q6 patch? That leaves netdev_max_backlog at the default value of 300 and uses another method to break up the networking codepaths, without any bad tradeoffs. Ingo - 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/