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Re: [kdb] KDB makes Nehalem hang at early boot until key press

To: Thomas Renninger <trenn@xxxxxxx>
Subject: Re: [kdb] KDB makes Nehalem hang at early boot until key press
From: Martin Hicks <mort@xxxxxxx>
Date: Fri, 30 Oct 2009 09:26:44 -0500
Cc: kdb@xxxxxxxxxxx
In-reply-to: <200910301512.06384.trenn@xxxxxxx>
References: <200910301102.57634.trenn@xxxxxxx> <20091030133222.GD10537@xxxxxxxxxxxxxxxxxxxxxxxxx> <200910301512.06384.trenn@xxxxxxx>
User-agent: Mutt/1.5.17 (2007-11-01)
On Fri, Oct 30, 2009 at 04:12:06PM +0200, Thomas Renninger wrote:
> 
> > > IMO something like the attached patch makes sense?
> > > This fixes the problem with kdb=off (our default).
> > > But I am anxious that kdb code could still get activitated somehow
> > > and the machine might oops when trying to access not initialized
> > > kdb structures? Could someone give an estimation how risky that
> > > patch really is?
> > 
> > I'd really rather fix the underlying problem.  I have no idea what that
> > might be though...
> Me too...

Can you send me the .config you're using, as well as the kernel
revision?  I'll try to duplicate it.

Can you try turning of CONFIG_KDB_USB if you have it enabled?

mh

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