* Re: [hugetlbfs] 3a47c54f09: kernel-selftests.vm.run_vmtests.sh../userfaultfd_hugetlb_256_32.fail
[not found] <202210211425.92ab6e9-yujie.liu@intel.com>
@ 2022-10-21 18:57 ` Mike Kravetz
0 siblings, 0 replies; only message in thread
From: Mike Kravetz @ 2022-10-21 18:57 UTC (permalink / raw)
To: kernel test robot
Cc: lkp, lkp, Andrew Morton, Miaohe Lin, Andrea Arcangeli,
Aneesh Kumar K.V, Axel Rasmussen, David Hildenbrand,
Davidlohr Bueso, James Houghton, Kirill A. Shutemov, Michal Hocko,
Mina Almasry, Muchun Song, Naoya Horiguchi, Pasha Tatashin,
Peter Xu, Prakash Sangappa, Sven Schnelle, linux-kernel, linux-mm,
regressions
On 10/21/22 16:04, kernel test robot wrote:
> Hi Mike,
>
> We noticed below commit reverts some hugetlb related code in fault path,
> and we happened to catch a "userfaultfd hugetlb" selftests failure on
> this commit. Could you please help check if this is an expected result?
>
> The commit message mentions about:
>
> "In subsequent patches, a new synchronization mechanism will be added to
> coordinate pmd sharing and eliminate this race."
>
> We noticed this failure still exists on the latest mainline head
> e35184f321518 ("Merge tag 'drm-fixes-2022-10-21' of git://anongit.freedesktop.org/drm/drm")
>
> Please kindly let us know if you'd like us to keep tracking this issue on
> mainline, or please feel free to ignore this report if this issue is not
> that important.
Fixed with commit 2ea7ff1e39cb "mm/hugetlb: fix race condition of uffd
missing/minor handling"
--
Mike Kravetz
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