Hello Steve, On Tue, Jul 08, 2014 at 12:37:38PM +0100, Steve Capper wrote: > On Tue, Jul 08, 2014 at 03:03:43PM +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/arm/include/asm/pgtable-3level.h | 3 +++ > > arch/arm64/include/asm/pgtable.h | 2 ++ > > 2 files changed, 5 insertions(+) > > Hi Minchan, > arch/arm and arch/arm64 are handled separately. > Could you please split this patch into arm and arm64 versions? > Sure. > > > > > diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h > > index 85c60adc8b60..3a7bb8dc7d05 100644 > > --- a/arch/arm/include/asm/pgtable-3level.h > > +++ b/arch/arm/include/asm/pgtable-3level.h > > @@ -220,6 +220,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) > > #define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING) > > #endif > > > > +#define pmd_dirty (pmd_val(pmd) & PMD_SECT_DIRTY) > > This macro is missing the parameter definition, and will generate a > compile errror when CONFIG_ARM_LPAE=y > > For 32-bit ARM with CONFIG_ARM_LPAE=n, we don't have THP support and I noticed > some compiler errors in mm/madvise.c: > > CC mm/madvise.o > mm/madvise.c: In function ‘madvise_free_pte_range’: > mm/madvise.c:279:3: error: implicit declaration of function ‘pmdp_get_and_clear’ [-Werror=implicit-function-declaration] > orig_pmd = pmdp_get_and_clear(mm, addr, pmd); > ^ > mm/madvise.c:285:3: error: implicit declaration of function ‘pmd_mkold’ [-Werror=implicit-function-declaration] > orig_pmd = pmd_mkold(orig_pmd); > ^ > mm/madvise.c:286:3: error: implicit declaration of function ‘pmd_mkclean’ [-Werror=implicit-function-declaration] > orig_pmd = pmd_mkclean(orig_pmd); > ^ > mm/madvise.c:288:3: error: implicit declaration of function ‘set_pmd_at’ [-Werror=implicit-function-declaration] > set_pmd_at(mm, addr, pmd, orig_pmd); > ^ > cc1: some warnings being treated as errors > make[1]: *** [mm/madvise.o] Error 1 > Oops, will fix. Thanks for the review! > > 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> -- Kind regards, Minchan Kim -- 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>