Messages in this thread | | | Subject | Re: [mm 4.15-rc8] Random oopses under memory pressure. | From | Dave Hansen <> | Date | Thu, 18 Jan 2018 06:38:10 -0800 |
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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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