netdev - Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

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Date:	Thu, 21 Aug 2008 06:33:06 -0700 (PDT)
From:	David Witbrodt <dawitbro@...global.net>
To:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Vivek Goyal <vgoyal@...hat.com>,
	Bill Fink <billfink@...dspring.com>,
	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, netdev <netdev@...r.kernel.org>
Subject: Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression

> > Please advise me on how you would like me to handle 2.6.27 kernels.
> > If I use your patch on 2.6.27-rc3, the message scroll off the 80x25 
> > screen before I can see them... 
> 
> Couldn't you play with CONFIG_BOOT_PRINTK_DELAY?

Thanks for this!  I am not a developer, so I am not familiar with all
of the little tweaks available in the kernel configs -- I've probably
seen this dozens of times, but ignored it because I wasn't debugging.

Now that I _am_ debugging, I wish I had paid more attention.

When I tried it, my kernel hung much earlier in the boot process.  The
help text for CONFIG_BOOT_PRINTK_DELAY even mentions that this can be
a problems on SMP systems, and that is exactly what I have.

Bummer.

Thanks though,
Dave W.
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