On Thu, Jan 18, 2018 at 06:38:10AM -0800, Dave Hansen wrote:
> On 01/18/2018 05:12 AM, Kirill A. Shutemov wrote:
> > - if (pte_page(*pvmw->pte) - pvmw->page >=
> > - hpage_nr_pages(pvmw->page)) {
>
> Is ->pte guaranteed to map a page which is within the same section as
> pvmw->page? Otherwise, with sparsemem (non-vmemmap), the pointer
> arithmetic won't work.
No, it's not guaranteed. It can be arbitrary page.
The arithmetic won't work because they are different "memory objects"?
--
Kirill A. Shutemov
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