On Mon, Apr 06, 2020 at 10:59:52AM -0400, Zi Yan wrote: > I ran this test with all patches from this series applied to Linus’s tree, but still see several failures. Is it expected? > The config file is attached. Let me know if I miss anything. BTW, I am running in a VM. > > Thanks. > > The output: > > ➜ ~ sudo ./khugepaged > Save THP and khugepaged settings... OK > Adjust settings... OK > Allocate huge page on fault... OK > Split huge PMD on MADV_DONTNEED... OK > Collapse fully populated PTE table.... Fail I was able to reproduce the issue. And it's fun failure mode. How did you get the test case inside the VM? Copy-paste source using 'cat' or something similar inside the VM? It screwed up CHECK_HUGE_FMT and CHECK_SWAP_FMT for me. Double back slash was converted to single. As result check_huge() and check_swap() gave the false-negative result all the time. Could you check that the source of the test-case is not mangled and re-test if it is. -- Kirill A. Shutemov
