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From: "Björn Persson" <spam-away@nowhere.nil>
Subject: Re: Libre site down, again
Date: Tue, 17 Oct 2006 19:31:00 GMT
Date: 2006-10-17T19:31:00+00:00	[thread overview]
Message-ID: <UbaZg.20197$E02.7962@newsb.telia.net> (raw)
In-Reply-To: <1161102935.771738.42820@e3g2000cwe.googlegroups.com>

Someone claiming to be a lethal noddle wrote:
> The strange thing is, running a 2.6.16 kernel as I am now,
> tcp_window_scaling is set to 1, but I can access libre just fine.

They changed the calculation of TCP buffer sizes. I think the point was 
to make better use of available memory. If there's plenty of memory, 
then Linux can afford to allocate a large buffer so that the sender can 
keep the pipe full of packets, and a large buffer requires a large scale 
factor. But the larger the scale factor is, the more hindered the 
communication is when these broken boxes mangle it. If a small scale 
factor gets mangled, your buffer will seem smaller than it is but the 
connection can still limp along. If a large scale factor gets mangled, 
the connection freezes completely.

-- 
Bj�rn Persson                              PGP key A88682FD
                    omb jor ers @sv ge.
                    r o.b n.p son eri nu



  reply	other threads:[~2006-10-17 19:31 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-14 10:07 Libre site down, again Tapani Rundgren
2006-10-14 10:19 ` Pascal Obry
2006-10-14 10:41 ` Björn Persson
2006-10-14 17:42   ` Tapani Rundgren
2006-10-14 18:02   ` Pascal Obry
2006-10-14 23:04     ` Björn Persson
2006-10-15  7:37       ` Pascal Obry
2006-10-17 12:47         ` Olivier Ramonat
2006-10-17 16:35           ` deadlyhead
2006-10-17 19:31             ` Björn Persson [this message]
2006-10-17 20:22             ` Samuel Tardieu
2006-10-18 13:45               ` Thomas Quinot
2006-10-18 19:21                 ` Björn Persson
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