On Tue, Mar 22, 2022 at 4:37 PM Christoph Hellwig wrote:
>
> > +static void dax_entry_mkclean(struct address_space *mapping, unsigned long
> > pfn,
> > + unsigned long npfn, pgoff_t start)
> > {
> > struct vm_area_struct *vma;
> > + pgoff_t end = start + npfn
> +static void dax_entry_mkclean(struct address_space *mapping, unsigned long
> pfn,
> + unsigned long npfn, pgoff_t start)
> {
> struct vm_area_struct *vma;
> + pgoff_t end = start + npfn - 1;
>
> i_mmap_lock_read(mapping);
> +
Currently dax_mapping_entry_mkclean() fails to clean and write protect
the pte entry within a DAX PMD entry during an *sync operation. This
can result in data loss in the following sequence:
1) process A mmap write to DAX PMD, dirtying PMD radix tree entry and
making the pmd entry dirty
3 matches
Mail list logo
