Re: [PATCH -v2 1/2] x86: Reserve [0xa0000, 0x100000] in e820 map

[Yinghai]

On 04/13/2010 04:07 PM, H. Peter Anvin wrote:
> On 04/13/2010 04:03 PM, Yinghai wrote:
>> On 04/13/2010 04:02 PM, H. Peter Anvin wrote:
>>>>
>>>> Are you sure? what is BAR range? greater than 1M ?
>>>>
>>>> e820_reserve_resources() will make that range to be reserved and BUSY in resource tree.
>>>> and if driver for that device want to call pci_request_region, it will get failure...
>>>>
>>>
>>> Yes, > 1 MB in that case, I'm fairly sure.
>>
>> that is ok. actually that is handled by e820_reserve_resource_late(), and it will not put BUSY on the entry at all.
>>
> 
> OK... why is that handled differently?

about one year ago, Linus made that change to use insert_resource_expand_to_fit() to honor PCI device BAR than E820_RESERVED.

YH
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