linux-kernel - Re: [PATCH 3/3] net: wireless: bcm43xx: big_buffer

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Message-ID: <520b60a90712142037j14d54de5nf5657ab2927fb3f5@mail.gmail.com>
Date:	Fri, 14 Dec 2007 23:37:44 -0500
From:	mvtodevnull@...il.com
To:	"Larry Finger" <larry.finger@...inger.net>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, "Michael Buesch" <mb@...sch.de>,
	"Daniel Walker" <dwalker@...sta.com>,
	"Ray Lee" <ray-lk@...rabbit.org>,
	"Simon Holm Thøgersen" <odie@...aau.dk>,
	matthias.kaehlcke@...il.com, linux-kernel@...r.kernel.org,
	linux@...mer.net, "Ingo Molnar" <mingo@...e.hu>,
	kjwinchester@...il.com, jonathan@...masters.org,
	akpm@...ux-foundation.org, bcm43xx-dev@...ts.berlios.de
Subject: Re: [PATCH 3/3] net: wireless: bcm43xx: big_buffer_sem semaphore to mutex

On Dec 14, 2007 9:27 PM, Larry Finger <larry.finger@...inger.net> wrote:
>
> I suspect that mac80211 is doing something that your router does not like. Do you have any chance to
> capture the traffic between your computer and the router by using a second wireless computer running
> kismet or wireshark? A look at the differences between b43 and bcm43xx should show the reason.
>

Hi Larry, thanks for replying.

I have to admit, I've never used either of these before, so I'm not
sure if I did this correctly.

I created two different packet dumps using kismet, one when my laptop
was using b43 and the other when it was using bcm43xx. While my
desktop was logging, I used my laptop to go to kernel.org and download
patch-2.6.23.11.bz2 (both times the browser started at
http://www.kernel.org/pub/linux/kernel/). Then I used tshark to parse
the dump files and create two new readable logs.

I'll attach these logs since I can't read much into them. The only
strange difference I noticed is that with b43, I got messages like
ICMP Destination unreachable (Host administratively prohibited), which
I didn't get with bcm43xx.

There's about 5 machines connected to this network -- the laptop with
the broadcom card has internal ip 192.168.0.3.
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