netdev - Re: b44: regression in 2.6.22 (resend)

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Date:	Mon, 28 May 2007 21:23:50 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Maximilian Engelhardt <maxi@...monizer.de>
Cc:	Michael Buesch <mb@...sch.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Jeff Garzik <jgarzik@...ox.com>,
	Gary Zambrano <zambrano@...adcom.com>, netdev@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: b44: regression in 2.6.22 (resend)

On Mon, 2007-05-28 at 19:44 +0200, Maximilian Engelhardt wrote:
> > Can you please keep CONFIG_HIGH_RES_TIMERS and CONFIG_NOHZ and try the
> > following combinations on the kernel command line:
> >
> > 1) highres=off nohz=off (should be the same as your working config)
> > 2) highres=off
> > 3) nohz=off
> 
> I tested this with my 2.6.22-rc3 kernel, here are the results:
> 
> without any special boot parameters: problem does appear
> highres=off nohz=off: problem does not appear
> highres=off: problem does not appear
> nohz=off: problem does appear

Is there any other strange behavior of the high res enabled kernel than
the b44 problem ?

> I additionally built my 2.6.22-rc2-mm1 kernel without High Resolution Timer, 
> but the high ping problem is still there.

Hmm, that's mysterious. Wild guess is that highres exposes the hidden
"feature" in a different way than rc2-mm1 does.

	tglx


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