Re: Introduce interface to report BIOS bugs (reworked, FW_BUG simple solution)

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On Fri, Aug 29, 2008 at 02:02:22PM +0200, Thomas Renninger wrote:
 > On Wednesday 27 August 2008 19:03:52 Dave Jones wrote:
 > > On Wed, Aug 27, 2008 at 05:44:01PM +0200, Thomas Renninger wrote:
 > >  > I posted this on acpi list first.
 > >  > Andi had concerns about what the best way would be to get
 > >  > this merged as two subsystems are touched:
 > >  > --------
 > >  > Looks good to me now. The only issue is that the patchkit is cross
 > >  > subsystem (cpufreq and ACPI). Either the patches go in through Andrew or
 > >  > we need to figure out how to merge this.
 > >
 > > I really couldn't care less about how this gets merged.
 > > It all seems rather pointless to me.
 > ?!?
 > The message "MP tables not supported" (or similar) on AMD machines
 > is rather common.
 > On Intel CPUs the same problem more seems to be exposed by a _PPC
 > (an ACPI cpufreq related function), but missing _PSS frequency tables.
 > 
 > Both have the same cause: The CPU is newer than the BIOS and thus
 > the BIOS cannot fill the ACPI table with valid CPU frequency information.
 > 
 > I thought especially the two CPU frequency patches I sent, trying to detect
 > above and tell the user about an old or broken BIOS nicely illustrates
 > how useful this is?
 > 
 > People (including myself) waste hours of time disassembling acpi tables
 > and digging in the kernel code why the CPU which is supposed to be
 > CPU frequency capable cannot switch frequencies.

I meant pointless in the sense "this doesn't do anything that the
current printk doesn't already tell us"

	Dave

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