linux-kernel - Re: [PATCH] quiet MMCONFIG related printks

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Date:	Wed, 3 Jan 2007 08:49:32 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH] quiet MMCONFIG related printks

On Wednesday, January 3, 2007 5:53 am, Arjan van de Ven wrote:
> On Mon, 2007-01-01 at 21:01 -0800, Jesse Barnes wrote:
> > Using MMCONFIG for PCI config space access is simply an
> > optimization, not a requirement.  Therefore, when it can't be used,
> > there's no need for KERN_ERR level message.  This patch makes the
> > message a KERN_INFO instead to reduce some of the noise in a kernel
> > boot with the 'quiet' option. (Note that this has no effect on a
> > normal boot, which is ridiculously verbose these days.)
>
> this is wrong, please leave this loud complaint in...

So the issues as I understand them:
  o some BIOSes are broken and don't properly map MCFG space (though
    according to Petr V. reserving MCFG space in e820 is optional, so
    the test may be slightly wrong as-is)
  o MCFG space is required for (many) PCIe devices (any regular PCI
    devices?)
  o often, there's nothing the user can do to address the points above

So where does that leave us?  I've got what I consider to be a stupid 
error message in my log.  My system behavior isn't affected in any way 
(at least that I can tell), yet I get a loud complaint at boot time.

I guess I just have to live with it?

Thanks,
Jesse

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