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.
WARN_ON_ONCE(page_to_section(pvmw->page) !=
page_to_section(pte_page(*pvmw->pte));
Will detect that.
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