kexec load failure introduced by "x86, memblock: Replace e820_/_early string with memblock_"

[H. Peter Anvin]

On 09/27/2010 04:32 PM, Yinghai Lu wrote:
> On 09/27/2010 04:26 PM, H. Peter Anvin wrote:
>> On 09/27/2010 04:20 PM, Yinghai Lu wrote:
>>>
>>> x86 own version for find_area?
>>>
>>
>> No, double no.
>>
>> Same kind of crap: overloading an interface with semantics it shouldn't
>> have.  The right thing is to introduce a new interface with carries the
>> explicitly needed policy with it... e.g. memblock_find_in_range_lowest().
>>
>> That interface would have the explicit semantics of returning the lowest
>> possible address, as opposed to any suitable address (which may change
>> if policy requirements change.)
>>
>> The other question is why does kexec need this in the first place?  Is
>> this due to a design bug in kexec or is there some fundamental reason
>> for this?
> 
> bzImage is used here. so need range below 4g.
> 

OK, so why don't you cap the range to 4 GiB and then pass that down to
the existing interface?  That's different from "lowest possible address".

	-hpa