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RE: TCP/HTTP Bug Fedora Core 8 (and 6)



You are quite correct.

Putting net.ipv4.tcp_window_scaling=0 into /etc/sysctl.conf and rebooting
works

I'll have to read more and understand the reasons and implications.

Thanks for your help.

Duncan

> -----Original Message-----
> From: fedora-list-bounces redhat com 
> [mailto:fedora-list-bounces redhat com] On Behalf Of Tomasz Torcz
> Sent: 28 November 2007 11:05
> To: For users of Fedora
> Subject: Re: TCP/HTTP Bug Fedora Core 8 (and 6)
> 
> 
> 
> Dnia 28-11-2007, śro o godzinie 10:46 +0000, Duncan Berriman pisze:
> > If a TCP/IP connection is made to a certain public web server 
> > then the transfer rate on Fedora Core 6 onwards is in the 
> > region of 100B/S (bytes per second). On Fedora Core 2 and 
> > Fedora Core 4 the speed is in the region of 300KB/s (Kbytes 
> > per second).
> 
>  That sounds like TCP window scaling bug on remote server. 
> Newer kernels
> expose it. See http://lwn.net/Articles/92727/
> 
> -- 
> Tomasz Torcz
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