Eric W. Biederman wrote:
>
>> Ok. I am decompressing the kernel to 16MB and after reducing 1MB of
>> CONFIG_PHYSICAL_START I am left with 15MB which is not 4M aligned
>> hence I seems to be running into it.
>>
>> I changed it to
>>
>> if ((u32)output) & 0x3fffff)
>>
>> and kdump kernel booted fine. But this will run into issues if I load
>> kernel at 1MB.
>>
>> I got a dump question. Why do I have to load the kernel at 4MB alignment?
>> Existing kernel boots loads at 1MB, which is non 4MB aligned and it works
>> fine?
>
> 4MB is a little harsh, but I haven't worked through what the exact rules
> are, I know 4MB is the worst case alignment for arch/i386.
>
4 MB would be worst case for i386; 2 MB for x86-64. Actually the x86-64
worst case would be gigabyte, but that's more than a little bit extreme.
-hpa
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