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From:   "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To:     Alexandre Ghiti <alex@ghiti.fr>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Rich Felker <dalias@libc.org>,
        "David S . Miller" <davem@davemloft.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H . Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
        linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
        linux-mm@kvack.org
Cc:     Alexandre Ghiti <alex@ghiti.fr>
Subject: Re: [PATCH v6 3/4] mm: Simplify MEMORY_ISOLATION && COMPACTION || CMA into CONTIG_ALLOC
In-Reply-To: <20190307132015.26970-4-alex@ghiti.fr>
References: <20190307132015.26970-1-alex@ghiti.fr> <20190307132015.26970-4-alex@ghiti.fr>
Date:   Thu, 14 Mar 2019 11:11:55 +0530
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Message-Id: <87y35iovvg.fsf@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
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Alexandre Ghiti <alex@ghiti.fr> writes:

> This condition allows to define alloc_contig_range, so simplify
> it into a more accurate naming.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>

>
> Suggested-by: Vlastimil Babka <vbabka@suse.cz>
> Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
> Acked-by: Vlastimil Babka <vbabka@suse.cz>
> ---
>  arch/arm64/Kconfig                     | 2 +-
>  arch/powerpc/platforms/Kconfig.cputype | 2 +-
>  arch/s390/Kconfig                      | 2 +-
>  arch/sh/Kconfig                        | 2 +-
>  arch/sparc/Kconfig                     | 2 +-
>  arch/x86/Kconfig                       | 2 +-
>  arch/x86/mm/hugetlbpage.c              | 2 +-
>  include/linux/gfp.h                    | 2 +-
>  mm/Kconfig                             | 3 +++
>  mm/page_alloc.c                        | 3 +--
>  10 files changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index a4168d366127..091a513b93e9 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -18,7 +18,7 @@ config ARM64
>  	select ARCH_HAS_FAST_MULTIPLIER
>  	select ARCH_HAS_FORTIFY_SOURCE
>  	select ARCH_HAS_GCOV_PROFILE_ALL
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  	select ARCH_HAS_KCOV
>  	select ARCH_HAS_MEMBARRIER_SYNC_CORE
>  	select ARCH_HAS_PTE_SPECIAL
> diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
> index 8c7464c3f27f..f677c8974212 100644
> --- a/arch/powerpc/platforms/Kconfig.cputype
> +++ b/arch/powerpc/platforms/Kconfig.cputype
> @@ -319,7 +319,7 @@ config ARCH_ENABLE_SPLIT_PMD_PTLOCK
>  config PPC_RADIX_MMU
>  	bool "Radix MMU Support"
>  	depends on PPC_BOOK3S_64
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  	default y
>  	help
>  	  Enable support for the Power ISA 3.0 Radix style MMU. Currently this
> diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
> index ed554b09eb3f..1c57b83c76f5 100644
> --- a/arch/s390/Kconfig
> +++ b/arch/s390/Kconfig
> @@ -69,7 +69,7 @@ config S390
>  	select ARCH_HAS_ELF_RANDOMIZE
>  	select ARCH_HAS_FORTIFY_SOURCE
>  	select ARCH_HAS_GCOV_PROFILE_ALL
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  	select ARCH_HAS_KCOV
>  	select ARCH_HAS_PTE_SPECIAL
>  	select ARCH_HAS_SET_MEMORY
> diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
> index 299a17bed67c..c7266302691c 100644
> --- a/arch/sh/Kconfig
> +++ b/arch/sh/Kconfig
> @@ -53,7 +53,7 @@ config SUPERH
>  	select HAVE_FUTEX_CMPXCHG if FUTEX
>  	select HAVE_NMI
>  	select NEED_SG_DMA_LENGTH
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  
>  	help
>  	  The SuperH is a RISC processor targeted for use in embedded systems
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index 0b7f0e0fefa5..ca33c80870e2 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -90,7 +90,7 @@ config SPARC64
>  	select ARCH_CLOCKSOURCE_DATA
>  	select ARCH_HAS_PTE_SPECIAL
>  	select PCI_DOMAINS if PCI
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  
>  config ARCH_DEFCONFIG
>  	string
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 68261430fe6e..8ba90f3e0038 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -23,7 +23,7 @@ config X86_64
>  	def_bool y
>  	depends on 64BIT
>  	# Options that are inherently 64-bit kernel only:
> -	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
> +	select ARCH_HAS_GIGANTIC_PAGE if CONTIG_ALLOC
>  	select ARCH_SUPPORTS_INT128
>  	select ARCH_USE_CMPXCHG_LOCKREF
>  	select HAVE_ARCH_SOFT_DIRTY
> diff --git a/arch/x86/mm/hugetlbpage.c b/arch/x86/mm/hugetlbpage.c
> index 92e4c4b85bba..fab095362c50 100644
> --- a/arch/x86/mm/hugetlbpage.c
> +++ b/arch/x86/mm/hugetlbpage.c
> @@ -203,7 +203,7 @@ static __init int setup_hugepagesz(char *opt)
>  }
>  __setup("hugepagesz=", setup_hugepagesz);
>  
> -#if (defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || defined(CONFIG_CMA)
> +#ifdef CONFIG_CONTIG_ALLOC
>  static __init int gigantic_pages_init(void)
>  {
>  	/* With compaction or CMA we can allocate gigantic pages at runtime */
> diff --git a/include/linux/gfp.h b/include/linux/gfp.h
> index 5f5e25fd6149..1f1ad9aeebb9 100644
> --- a/include/linux/gfp.h
> +++ b/include/linux/gfp.h
> @@ -585,7 +585,7 @@ static inline bool pm_suspended_storage(void)
>  }
>  #endif /* CONFIG_PM_SLEEP */
>  
> -#if (defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || defined(CONFIG_CMA)
> +#ifdef CONFIG_CONTIG_ALLOC
>  /* The below functions must be run on a range from a single zone. */
>  extern int alloc_contig_range(unsigned long start, unsigned long end,
>  			      unsigned migratetype, gfp_t gfp_mask);
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 25c71eb8a7db..137eadc18732 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -258,6 +258,9 @@ config ARCH_ENABLE_HUGEPAGE_MIGRATION
>  config ARCH_ENABLE_THP_MIGRATION
>  	bool
>  
> +config CONTIG_ALLOC
> +       def_bool (MEMORY_ISOLATION && COMPACTION) || CMA
> +
>  config PHYS_ADDR_T_64BIT
>  	def_bool 64BIT
>  
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 35fdde041f5c..ac9c45ffb344 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -8024,8 +8024,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
>  	return true;
>  }
>  
> -#if (defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || defined(CONFIG_CMA)
> -
> +#ifdef CONFIG_CONTIG_ALLOC
>  static unsigned long pfn_max_align_down(unsigned long pfn)
>  {
>  	return pfn & ~(max_t(unsigned long, MAX_ORDER_NR_PAGES,
> -- 
> 2.20.1