[V2] powerpc/Kconfig: Update config option based on page size.

[Michael Ellerman]

santhosh <santhog4 at linux.vnet.ibm.com> writes:

>> Michael Ellerman <mpe at ellerman.id.au> writes:
>>
>>> On Fri, 2016-19-02 at 05:38:47 UTC, Rashmica Gupta wrote:
>>>> Currently on PPC64 changing kernel pagesize from 4K to 64K leaves
>>>> FORCE_MAX_ZONEORDER set to 13 - which produces a compile error.
>>>>
>>> ...
>>>> So, update the range of FORCE_MAX_ZONEORDER from 9-64 to 8-9 for 64K pages
>>>> and from 13-64 to 9-13 for 4K pages.
>>>
>>> https://git.kernel.org/powerpc/c/a7ee539584acf4a565b7439cea
>>>
>> HPAGE_PMD_ORDER is not something we should check w.r.t 4k linux page
>> size. We do have the below constraint w.r.t hugetlb pages
>>
>> static inline bool hstate_is_gigantic(struct hstate *h)
>> {
>> 	return huge_page_order(h) >= MAX_ORDER;
>> }
>>
>> That require MAX_ORDER to be greater than 12.

So have you tried that fix?

cheers