linux-kernel - Re: KDB blindly reads keyboard port

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Message-ID: <16089.1163139357@kao2.melbourne.sgi.com>
Date:	Fri, 10 Nov 2006 17:15:57 +1100
From:	Keith Owens <kaos@....com>
To:	Matthew Wilcox <matthew@....cx>
cc:	Bjorn Helgaas <bjorn.helgaas@...com>, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org
Subject: Re: KDB blindly reads keyboard port 

Matthew Wilcox (on Thu, 9 Nov 2006 21:28:03 -0700) wrote:
>On Fri, Nov 10, 2006 at 03:23:20PM +1100, Keith Owens wrote:
>> Bjron, could you try kdb-v4.4-2.6.19-rc5-{common,ia64}-2 on your
>> problem system?  I changed kdb so it only uses the keyboard if at least
>> one console matches the pattern /^tty[0-9]*$/.  IOW, if the user
>> specifies an i8042 style console on the command line (or uses the
>> default with CONFIG_VT=y) then kdb will attempt to use that keyboard.
>> Otherwise kdb ignores a VT style console, even when the kernel is
>> compiled with CONFIG_VT=y.
>
>If I'm using an HP Integrity system with a USB keyboard, won't I still
>have a console that matches ^tty[0-9]*$ ?

Good point.  How about the console list must include /^tty[0-9]*$/
_and_ there must be an interrupt registered with a name of "i8042"
before KDB will attempt to access i8042 ports?

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