On Mon, Apr 06, 2020 at 02:50:32PM -0400, Zi Yan wrote: > khugepaged-58 [001] .... 9913.990380: mm_khugepaged_scan_pmd: mm=00000000283d31fc, scan_pfn=0x2ae4bd, writable=0, referenced=512, none_or_zero=0, status=no_writable_page, unmapped=0 Looks like all failures due to lack of writable ptes. That's very strange because we write to the page on fill. You've mentioned that you run it in VM. I wounder if it can be a virtualizaiton artefact. I run tests under KVM and they are fine. What is your virtualization setup? -- Kirill A. Shutemov
