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SubjectRe: [PATCH][2.6] No swapping on memory backed swapfiles
Zwane Mwaikambo <zwane@arm.linux.org.uk> wrote:
>
> + bdi = mapping->backing_dev_info;
> + if (bdi->memory_backed)
> + goto bad_swap;
> +

I guess that makes sense, although someone might want to swap onto a
ramdisk-backed file just for some testing purpose.

Why not simply test for a null ->readpage()?

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