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SubjectRe: [PATCH 2/2] mm: THP page cache support for ppc64
On Mon, Nov 07, 2016 at 02:04:41PM +0530, Aneesh Kumar K.V wrote:
> @@ -2953,6 +2966,13 @@ static int do_set_pmd(struct fault_env *fe, struct page *page)
> ret = VM_FAULT_FALLBACK;
> page = compound_head(page);
>
> + /*
> + * Archs like ppc64 need additonal space to store information
> + * related to pte entry. Use the preallocated table for that.
> + */
> + if (arch_needs_pgtable_deposit() && !fe->prealloc_pte)
> + fe->prealloc_pte = pte_alloc_one(vma->vm_mm, fe->address);
> +

-ENOMEM handling?

I think we should do this way before this point. Maybe in do_fault() or
something.

--
Kirill A. Shutemov

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