From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 10 Oct 2002 02:01:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 10 Oct 2002 02:01:14 -0400 Received: from pizda.ninka.net ([216.101.162.242]:59575 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Thu, 10 Oct 2002 02:01:13 -0400 Date: Wed, 09 Oct 2002 22:59:41 -0700 (PDT) Message-Id: <20021009.225941.88169695.davem@redhat.com> To: akpm@digeo.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: 2.5.41-mm2 From: "David S. Miller" In-Reply-To: <3DA512B1.63287C02@digeo.com> References: <3DA512B1.63287C02@digeo.com> X-FalunGong: Information control. X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) 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 From: Andrew Morton Date: Wed, 09 Oct 2002 22:40:01 -0700 but we're seeing a consistent few-percent regression in tests which perform networking to localhost. There's debugging code in loopback that is helping us stress test the TCP segmentation offload, you might want to disable that to get more reliable numbers in 2.5.x. Try this: --- drivers/net/loopback.c.~1~ Wed Oct 9 23:01:16 2002 +++ drivers/net/loopback.c Wed Oct 9 23:01:35 2002 @@ -190,12 +190,12 @@ dev->rebuild_header = eth_rebuild_header; dev->flags = IFF_LOOPBACK; dev->features = NETIF_F_SG|NETIF_F_FRAGLIST|NETIF_F_NO_CSUM|NETIF_F_HIGHDMA; - +#if 0 /* Current netfilter will die with oom linearizing large skbs, * however this will be cured before 2.5.x is done. */ dev->features |= NETIF_F_TSO; - +#endif dev->priv = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL); if (dev->priv == NULL) return -ENOMEM;