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| author | Khalid Aziz <khalid.aziz@oracle.com> | 2018-02-21 10:15:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-18 07:38:45 -0700 |
| commit | ca827d55ebaa24de9fca36ee24e42d6fc5119ee3 (patch) | |
| tree | 12b0ff1c2705daaeeeb7fd4d5a0be63d7098016f /mm/memory.c | |
| parent | d84bb709aa4a6a155b1aaaf449cad21f02be4594 (diff) | |
| download | linux-ca827d55ebaa24de9fca36ee24e42d6fc5119ee3.tar.bz2 | |
mm, swap: Add infrastructure for saving page metadata on swap
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@oracle.com>
Cc: Khalid Aziz <khalid@gonehiking.org>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c index 5fcfc24904d1..aed37325d94e 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3053,6 +3053,7 @@ int do_swap_page(struct vm_fault *vmf) if (pte_swp_soft_dirty(vmf->orig_pte)) pte = pte_mksoft_dirty(pte); set_pte_at(vma->vm_mm, vmf->address, vmf->pte, pte); + arch_do_swap_page(vma->vm_mm, vma, vmf->address, pte, vmf->orig_pte); vmf->orig_pte = pte; /* ksm created a completely new copy */ |