Re: [PATCH][2.6] No swapping on memory backed swapfiles

[Andrew Morton]

Zwane Mwaikambo <zwane@xxxxxxxxxxxxxxxx> 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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