Ingo Molnar wrote:
quoted text
> * Andreas Herrmann3 <andreas.herrmann3@amd.com> wrote:
> 
>> For the failed devices I get:
>>
>>   sata_sil 0000:00:12.0: version 2.3
>>   ACPI: PCI Interrupt 0000:00:12.0[A] -> GSI 22 (level, low) -> IRQ 22
>>   ioremap_nocache: addr c0403000, size 200
>>   swapper:1 conflicting cache attribute c0403000-c0404000 uncached<->default
>>   ACPI: PCI interrupt for device 0000:00:12.0 disabled
> 
> hm, is the problem that the two devices share the same physical page, 
> and thus get an overlapping area?
> 
> as an intermediate fix, how about following the attribute of the already 
> existing mapping, instead of rejecting the ioremap due to the conflict? 
> I.e. something like below?

The correct behaviour probably would be to go with the most restrictive 
caching behaviour, i.e. uncached in this case.

	-hpa
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