From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754415AbaGHLhw (ORCPT ); Tue, 8 Jul 2014 07:37:52 -0400 Received: from mail-wi0-f182.google.com ([209.85.212.182]:38017 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754371AbaGHLhu (ORCPT ); Tue, 8 Jul 2014 07:37:50 -0400 Date: Tue, 8 Jul 2014 12:37:38 +0100 From: Steve Capper To: Minchan Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michael Kerrisk , Linux API , Hugh Dickins , Johannes Weiner , Rik van Riel , KOSAKI Motohiro , Mel Gorman , Jason Evans , Zhang Yanfei , "Kirill A. Shutemov" , Catalin Marinas , Will Deacon , Russell King , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v11 6/7] ARM: add pmd_[dirty|mkclean] for THP Message-ID: <20140708113737.GA2958@linaro.org> References: <1404799424-1120-1-git-send-email-minchan@kernel.org> <1404799424-1120-7-git-send-email-minchan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1404799424-1120-7-git-send-email-minchan@kernel.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > Cc: Will Deacon > Cc: Steve Capper > Cc: Russell King > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Minchan Kim > --- > 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? > > 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 Cheers, -- Steve