[PATCH v5 0/7] mm/mprotect: Fix dax puds

[David Hildenbrand]

On 13.11.24 17:39, Peter Xu wrote:
> On Mon, Nov 11, 2024 at 10:20:59PM +0100, Jann Horn wrote:
>> On Mon, Aug 12, 2024 at 8:12 PM Peter Xu <peterx at redhat.com> wrote:
>>> Dax supports pud pages for a while, but mprotect on puds was missing since
>>> the start.  This series tries to fix that by providing pud handling in
>>> mprotect().  The goal is to add more types of pud mappings like hugetlb or
>>> pfnmaps.  This series paves way for it by fixing known pud entries.
>>
>> Do people actually use hardware where they can use PUD THP mappings
>> for DAX? I thought that was just some esoteric feature that isn't
>> actually usable on almost any system.
>> Was I wrong about that?
> 
> I did run it with a qemu emulated nvdimm device.  Though in reality I've no
> idea on how many people are using it..

I wonder if we still have to support it ... or could disable it+rip it out.

-- 
Cheers,

David / dhildenb