CONFIG_DEBUG_PAGEALLOC generates WARN_ON() in ppc32 hash

[Kumar Gala]

On Mar 27, 2009, at 6:05 PM, Benjamin Herrenschmidt wrote:

> On Fri, 2009-03-27 at 06:56 -0500, Kumar Gala wrote:
>> Ben,
>>
>> If we have CONFIG_DEBUG_PAGEALLOC enabled we end up hitting the
>> WARN_ON() in set_pte_at() when we boot.  This appears because we've
>> already setup pte's via mapin_ram() after which we end up calling
>> kernel_map_pages().
>>
>> So I'm not sure if __change_page_attr() should be doing something
>> different or if the WARN_ON() should be conditional on !
>> CONFIG_DEBUG_PAGEALLOC
>
> Or use __set_pte_at() ?
>
> Note that C_D_P doesn't work on hash32 anyway...

really, what mmu config does it work on ? just hash64?

- k