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Date:	Mon, 04 Jun 2007 08:39:48 +0200
From:	Thomas Gleixner <>
To:	Maximilian Engelhardt <>
Cc:	Michael Buesch <>,
	linux-kernel <>,
	linux-wireless <>,
	Stephen Hemminger <>,
	Arnaldo Carvalho de Melo <>,
	Jeff Garzik <>,
	Gary Zambrano <>,,
	Andrew Morton <>
Subject: Re: b44: regression in 2.6.22 (resend)

On Sun, 2007-06-03 at 18:26 +0200, Maximilian Engelhardt wrote:
> > Is there any other strange behavior of the high res enabled kernel than
> > the b44 problem ?
> I didn't notice anything in the past (as I wrote). But today I did some tests 
> for an updated version of the p54 mac80211 wlan driver and I noticed exactly 
> the same problem:
> when booting with highres=off everything is fine.
> But when I boot an highres enabled kernel and I do the iperf-test with the p54 
> driver, my systems becomes unresponsive during the test. It seems to be 
> exactly the same problem I have with the b44 driver.
> So this might not be a bug in the b44 code but a bug somewhere in the linux 
> networking code.
> I did the test with an 2.6.22-rc3-git4 kernel and the p54 driver built 
> external as module. 

Can you look at iperf to figure out, whether it does some weird timer
stuff (high frequency interval timer or such) ? Either check the code or
strace it.


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