Re: [PATCH v2 1/3] arm64: hugetlb: Fix huge_pte_offset to return poisoned page table entries

[Catalin Marinas]

On Wed, May 17, 2017 at 04:23:34PM +0100, Punit Agrawal wrote:
> When memory failure is enabled, a poisoned hugepage pte is marked as a
> swap entry. huge_pte_offset() does not return the poisoned page table
> entries when it encounters PUD/PMD hugepages.
> 
> This behaviour of huge_pte_offset() leads to error such as below when
> munmap is called on poisoned hugepages.
> 
> [  344.165544] mm/pgtable-generic.c:33: bad pmd 000000083af00074.
> 
> Fix huge_pte_offset() to return the poisoned pte which is then
> appropriately handled by the generic layer code.
> 
> Signed-off-by: Punit Agrawal <punit.agrawal@xxxxxxx>
> Acked-by: Steve Capper <steve.capper@xxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: David Woods <dwoods@xxxxxxxxxxxx>

Since the patch matches my suggestions in v1:

Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>