Messages in this thread Patch in this message | | | Date | Mon, 11 Jan 2021 17:25:33 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH v2 2/3] mm: Allow architectures to request 'old' entries when prefaulting |
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On Fri, Jan 08, 2021 at 05:15:16PM +0000, Will Deacon wrote: > diff --git a/mm/filemap.c b/mm/filemap.c > index c1f2dc89b8a7..0fb9d1714797 100644 > --- a/mm/filemap.c > +++ b/mm/filemap.c > @@ -3051,14 +3051,18 @@ vm_fault_t filemap_map_pages(struct vm_fault *vmf, > if (!pte_none(*vmf->pte)) > goto unlock; > > + /* We're about to handle the fault */ > + if (vmf->address == address) { > + vmf->flags &= ~FAULT_FLAG_PREFAULT; > + ret = VM_FAULT_NOPAGE; > + } else { > + vmf->flags |= FAULT_FLAG_PREFAULT; > + } > +
Do we need to restore the oririnal status of the bit once we are done?
-- Kirill A. Shutemov
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