Re: [PATCH v2] mm: memory: fix truncation removing mapped folios

[Baolin Wang]

On 10/20/26 4:36 PM, David Hildenbrand (Arm) wrote:
> > > >                   if (pmd_none(*pmd)) {
> > > > +                       if (details && details->single_folio)
> > > > +                               sync_with_folio_pmd_zap(tlb->mm, pmd);
> > > >                           addr = next;
> > > >                           continue;
> > > >                   }
> > >
> > > We do have another sync_with_folio_pmd_zap() user in page_vma_mapped_walk(),
> > > does that one need care as well?
> >
> > Good point. But I don't want to add page_vma_mapped_walk() changes into this fix
> > patch. I need to analyze all callers of page_vma_mapped_walk() and the potential
> > races. I'll look into whether it should be changed in a follow-up patch.
>
> Yes, please have a look. I am 99.9% sure that we face the exact same issue there
> as well.

Sure. Add it to my TODO list.

BTW, could you take a look at my reply to your concern about v3 when you 
feel free? Thanks.

https://lore.kernel.org/all/179c26ed-1764-4e5b-a7ee-047ddabbfea1@xxxxxxxxxxxxxxxxx/