Re: [PATCH v2 2/4] mm: internal: fix inconsistent in folio_pte_batch_flags() for shadow stack

[David Hildenbrand (Arm)]

On 11/2/26 15:07, Yeoreum Yun wrote:
>>>
>>> Sorry. But I couldn't follow. If we accumalate with any_unwritable
>>> and check it out of loop once only, we couldn't properly nr value or
>>> Am I missing something?
>>
>> Ah. The idea was to simply reject the batch entirely if that happens. It would
>> only matter if some folio PTEs are writable while others are not ... well, ok,
>> there are some cases where that can happen, but it's not really the common case.
>>
>> I think we should simply disallow ever getting large folios into shadow stack
>> VMAs for now. So I'd prefer the fix below.
>>
>> Thoughts?
> 
> That's my preference too and we've discussed :)
> I'll repost with below unless anyone has any strong comment.

Yes, best to wait a couple of days for people to catch up.

-- 
Cheers,

David