Re: [PATCH v2 2/2] mm/mprotect: special-case small folios when applying write permissions

David Hildenbrand (Arm)
2026-04-02T07:11:57Z

On 4/2/26 05:44, Andrew Morton wrote:
> On Wed, 1 Apr 2026 17:09:31 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
>>> I can easily extending
>>>
>>> https://gitlab.com/davidhildenbrand/scratchspace/-/blob/main/pte-mapped-folio-benchmarks.c
>>>
>>> to have an "mprotect" mode. I had that in the past bit discarded it.
>>>
>>> Then, we can easily measure the effect on various folio sizes when
>>> mprotect'ing a larger memory area.
>>>
>>> With order-0 we can then benchmark small folios exclusively.
>>
>> It sounds like this is all possible future work?
>>
>> We have Lorenzo's R-b on this [2/2]. I'm reading this discussion as
>> "upstream both"?
>
> Sorry, please ignore. Reading skills.

Maybe writing skills on my end. I think we should do #2 properly.

#1 is good to go.

--
Cheers,

David