Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 21 Feb 2001 14:10:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 21 Feb 2001 14:10:31 -0500 Received: from eschelon.gamesquad.net ([216.115.239.45]:37384 "HELO eschelon.gamesquad.net") by vger.kernel.org with SMTP id ; Wed, 21 Feb 2001 14:10:19 -0500 From: "Vibol Hou" To: "David S. Miller" , Cc: "Linux-Kernel" , Subject: RE: 2.4 tcp very slow under certain circumstances (Re: netdev issues (3c905B)) Date: Wed, 21 Feb 2001 11:06:49 -0800 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Importance: Normal In-Reply-To: <14995.40701.818777.181432@pizda.ninka.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Win2K here, I'll apply the patch and let you know what happens. -Vibol -----Original Message----- From: David S. Miller [mailto:davem@redhat.com] Sent: Wednesday, February 21, 2001 2:57 AM To: ookhoi@dds.nl Cc: Vibol Hou; Linux-Kernel; sim@stormix.com Subject: Re: 2.4 tcp very slow under certain circumstances (Re: netdev issues (3c905B)) Ookhoi writes: > We have exactly the same problem but in our case it depends on the > following three conditions: 1, kernel 2.4 (2.2 is fine), 2, windows ip > header compression turned on, 3, a free internet access provider in > Holland called 'Wish' (which seemes to stand for 'I Wish I had a faster > connection'). > If we remove one of the three conditions, the connection is oke. It is > only tcp which is affected. > A packet on its way from linux server to windows client seems to get > dropped once and retransmitted. This makes the connection _very_ slow. :-( I hate these buggy systems. Does this patch below fix the performance problem and are the windows clients win2000 or win95? --- include/net/ip.h.~1~ Mon Feb 19 00:12:31 2001 +++ include/net/ip.h Wed Feb 21 02:56:15 2001 @@ -190,9 +190,11 @@ static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst) { +#if 0 if (iph->frag_off&__constant_htons(IP_DF)) iph->id = 0; else +#endif __ip_select_ident(iph, dst); } - 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/