Messages in this thread | | | Date | Fri, 10 Apr 2020 14:47:39 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCHv2 1/8] khugepaged: Add self test |
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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
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