linux-kernel - Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned

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Message-ID: <4BEDE763.4040802@zytor.com>
Date:	Fri, 14 May 2010 17:14:27 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	Mike Travis <travis@....com>, Bjorn Helgaas <bjorn.helgaas@...com>,
	Mike Habeck <habeck@....com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Jacob Pan <jacob.jun.pan@...el.com>, Tejun Heo <tj@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Yinghai <yinghai.lu@...cle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Myron Stowe <myron.stowe@...com>
Subject: Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already
 assigned

On 05/14/2010 05:00 PM, Jesse Barnes wrote:
> On Fri, 14 May 2010 16:39:59 -0700
> "H. Peter Anvin" <hpa@...or.com> wrote:
> 
>> On 05/14/2010 04:34 PM, Jesse Barnes wrote:
>>>> I'm not lamenting that fact, because my experience is that what ends up
>>>> replacing it is often far worse.  Consider UARTs -- no MMU dependencies
>>>> at all, can be accessed with four lines of assembly, and compare it to
>>>> EHCI debug port, the driver for which is over 900 lines in the Linux
>>>> kernel -- and that assumes that you're already in flat mode.
>>>
>>> Heh, you're so old and crufty!
>>
>> I know.  Debugging is so 20th century.
> 
> Yeah, get with the times.  Debugging on today's machines means you have
> to look up register block offsets in ACPI, run some AML to setup your
> debug port, and then load a microkernel onto the debug device to get
> your vnc enabled debug console!
> 

An excellent plan!  Cannot fail!

	-hpa

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