On Mon, Jul 07, 2014 at 09:53:57AM +0900, Minchan Kim wrote: > MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent > overwrite of the contents since MADV_FREE syscall is called for > THP page. > > This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE > support. > > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Cc: Steve Capper <steve.capper@xxxxxxxxxx> > Cc: Russell King <linux@xxxxxxxxxxxxxxxx> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> > --- > arch/arm64/include/asm/pgtable.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h > index 579702086488..f3ec01cef04f 100644 > --- a/arch/arm64/include/asm/pgtable.h > +++ b/arch/arm64/include/asm/pgtable.h > @@ -240,10 +240,12 @@ static inline pmd_t pte_pmd(pte_t pte) > #endif > > #define pmd_young(pmd) pte_young(pmd_pte(pmd)) > +#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd)) > #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd))) > #define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd))) > #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd))) > #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) > +#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd))) > #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) > #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) > #define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) & ~PMD_TYPE_MASK)) > -- > 2.0.0 > Hi Minchan, This looks good to me too. As Will said this applies to arm64, we will also need a version for: arch/arm/include/asm/pgtable-3level.h. Is there a testcase we can run to check that this patch set is working well for arm/arm64? Cheers, -- Steve -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>