Re: [PATCH v12 02/11] mm, swap: Add infrastructure for saving page metadata on swap

[Andrew Morton]

On Wed, 21 Feb 2018 10:15:44 -0700 Khalid Aziz <khalid.aziz@xxxxxxxxxx> wrote:

> If a processor supports special metadata for a page, for example ADI
> version tags on SPARC M7, this metadata must be saved when the page is
> swapped out. The same metadata must be restored when the page is swapped
> back in. This patch adds two new architecture specific functions -
> arch_do_swap_page() to be called when a page is swapped in, and
> arch_unmap_one() to be called when a page is being unmapped for swap
> out. These architecture hooks allow page metadata to be saved if the
> architecture supports it.
> 
> Signed-off-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
> Cc: Khalid Aziz <khalid@xxxxxxxxxxxxxx>
> Acked-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
> Reviewed-by: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>

Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>