From: "Vibol Hou" <vibol@khmer.cc>
To: "David S. Miller" <davem@redhat.com>, <ookhoi@dds.nl>
Cc: "Linux-Kernel" <linux-kernel@vger.kernel.org>, <sim@stormix.com>
Subject: RE: 2.4 tcp very slow under certain circumstances (Re: netdev issues (3c905B))
Date: Wed, 21 Feb 2001 11:22:42 -0800 [thread overview]
Message-ID: <HDEBKHLDKIDOBMHPKDDKGEKOEFAA.vibol@khmer.cc> (raw)
In-Reply-To: <14995.40701.818777.181432@pizda.ninka.net>
It looks like the patch fixed the problem. TCP communications over modem
seems fine now with the same settings that didnt' work earlier.
-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);
}
next prev parent reply other threads:[~2001-02-21 19:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-21 0:06 netdev issues (3c905B) Vibol Hou
2001-02-21 0:21 ` Martin Moerman
2001-02-21 0:34 ` Vibol Hou
2001-02-21 9:47 ` 2.4 tcp very slow under certain circumstances (Re: netdev issues (3c905B)) Ookhoi
2001-02-21 13:12 ` Gregory Maxwell
2001-02-21 10:57 ` David S. Miller
2001-02-21 11:33 ` Ookhoi
2001-02-21 17:17 ` Ookhoi
2001-02-21 19:06 ` Vibol Hou
2001-02-21 19:22 ` Vibol Hou [this message]
2001-02-21 22:30 ` Jordan Mendelson
2001-02-22 8:28 ` Ookhoi
2001-02-21 23:49 ` Jordan Mendelson
2001-02-21 23:52 ` David S. Miller
2001-02-22 0:10 ` Jordan Mendelson
2001-02-22 0:50 ` Jordan Mendelson
2001-02-27 0:21 ` Simon Kirby
2001-02-27 0:26 ` David S. Miller
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