From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 09 Oct 2002 22:59:41 -0700 (PDT) Message-Id: <20021009.225941.88169695.davem@redhat.com> Subject: Re: 2.5.41-mm2 From: "David S. Miller" In-Reply-To: <3DA512B1.63287C02@digeo.com> References: <3DA512B1.63287C02@digeo.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@digeo.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: 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; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/