Messages in this thread | | | Subject | Re: [PATCH] quiet MMCONFIG related printks | From | Arjan van de Ven <> | Date | Wed, 03 Jan 2007 09:01:13 -0800 |
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On Wed, 2007-01-03 at 08:49 -0800, Jesse Barnes wrote: > 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)
it's optional but it's the best test we have for "is the bios total crap" ;(
> o MCFG space is required for (many) PCIe devices (any regular PCI > devices?)
it's not required for *many* (it can't be, windows XP doesn't use MCFG), but it's required for some of the advanced PCI-E features
> o often, there's nothing the user can do to address the points above
other than complain to the vendor.
> > So where does that leave us? I've got what I consider to be a stupid > error message in my log.
contact your bios vendor.
> 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?
We really really should complain about bios issues. If only to make sure vendors who do pay attention to linux have a chance of finding and fixing them (and via the firmware kit, several big vendors pay attention early on nowadays)
-- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org
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