Will Deacon <w...@kernel.org> writes:
> On Wed, 21 Jul 2021 17:02:13 +1000, Michael Ellerman wrote:
>> This reverts commit c742199a014de23ee92055c2473d91fe5561ffdf.
>>
>> c742199a014d ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge")
>> breaks arm64 in at least two ways for configurations where PUD or PMD
>> folding occur:
>>
>> 1. We no longer install huge-vmap mappings and silently fall back to
>> page-granular entries, despite being able to install block entries
>> at what is effectively the PGD level.
>>
>> [...]
>
> Thank you Michael! I owe you a beer next time I see you, if we don't go
> extinct before then.
No worries, thanks to Christophe for identifying the solution while on
vacation!
Beers seem a long way off, but hopefully one day :)
cheers
