From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f181.google.com (mail-we0-f181.google.com [74.125.82.181]) by kanga.kvack.org (Postfix) with ESMTP id 4E7C26B0035 for ; Fri, 18 Jul 2014 10:54:36 -0400 (EDT) Received: by mail-we0-f181.google.com with SMTP id k48so3592493wev.12 for ; Fri, 18 Jul 2014 07:54:35 -0700 (PDT) Received: from mail-we0-f170.google.com (mail-we0-f170.google.com [74.125.82.170]) by mx.google.com with ESMTPS id gm1si4263648wib.20.2014.07.18.07.54.29 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 18 Jul 2014 07:54:30 -0700 (PDT) Received: by mail-we0-f170.google.com with SMTP id w62so4745436wes.29 for ; Fri, 18 Jul 2014 07:54:29 -0700 (PDT) Date: Fri, 18 Jul 2014 15:54:22 +0100 From: Steve Capper Subject: Re: [PATCH v13 6/8] arm: add pmd_[dirty|mkclean] for THP Message-ID: <20140718145421.GA18569@linaro.org> References: <1405666386-15095-1-git-send-email-minchan@kernel.org> <1405666386-15095-7-git-send-email-minchan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1405666386-15095-7-git-send-email-minchan@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: 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 On Fri, Jul 18, 2014 at 03:53:04PM +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 This patch looks good to me: Acked-by: Steve Capper There is another patch that introduces a helper function to test for pmd bits, please see below. > --- > arch/arm/include/asm/pgtable-3level.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h > index 85c60adc8b60..830f84f2d277 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) (pmd_val(pmd) & PMD_SECT_DIRTY) Russell, Should this be folded into my {pte|pmd}_isset patch? http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/268979.html Cheers, -- Steve > + > #define PMD_BIT_FUNC(fn,op) \ > static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; } > > @@ -228,6 +230,7 @@ PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF); > PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING); > PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY); > PMD_BIT_FUNC(mkdirty, |= PMD_SECT_DIRTY); > +PMD_BIT_FUNC(mkclean, &= ~PMD_SECT_DIRTY); > PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF); > > #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT)) > -- > 2.0.0 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org