Re: [PATCH v7 2/9] mm, swap: Add infrastructure for saving page metadata on swap

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From: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Date: Wed,  9 Aug 2017 15:25:55 -0600

> @@ -1399,6 +1399,12 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
>  				(flags & TTU_MIGRATION)) {
>  			swp_entry_t entry;
>  			pte_t swp_pte;
> +
> +			if (arch_unmap_one(mm, vma, address, pteval) < 0) {
> +				set_pte_at(mm, address, pvmw.pte, pteval);
> +				ret = false;
> +				page_vma_mapped_walk_done(&pvmw);
> +				break;
>  			/*
>  			 * Store the pfn of the page in a special migration
>  			 * pte. do_swap_page() will wait until the migration
> @@ -1410,6 +1416,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
>  			if (pte_soft_dirty(pteval))
>  				swp_pte = pte_swp_mksoft_dirty(swp_pte);
>  			set_pte_at(mm, address, pvmw.pte, swp_pte);
> +			}

This basic block doesn't look right.  I think the new closing brace is
intended to be right after the new break; statement.  If not at the
very least the indentation of the existing code in there needs to be
adjusted.




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