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: <20100514170004.6577415b@virtuousgeek.org>
Date:	Fri, 14 May 2010 17:00:04 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	"H. Peter Anvin" <hpa@...or.com>
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 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!

-- 
Jesse Barnes, Intel Open Source Technology Center
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