Messages in this thread | | | Date | Thu, 18 Jan 2018 17:45:14 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [mm 4.15-rc8] Random oopses under memory pressure. |
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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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