Re: [RFC 09/10] mm/khugepage.c: Warn if trying to scan devmap pmd

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On 11.04.24 02:57, Alistair Popple wrote:
The only user of devmap PTEs is FS DAX, and khugepaged should not be
scanning these VMAs. This is checked by calling
hugepage_vma_check. Therefore khugepaged should never encounter a
devmap PTE. Warn if this occurs.

Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx>

---

Note this is a transitory patch to test the above assumption both at
runtime and during review. I will likely remove it as the whole thing
gets deleted when pXX_devmap is removed.

Yes, doesn't make sense for this patch to exist if it would go upstream along with the next patch that removes that completely.

--
Cheers,

David / dhildenb





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