linux-kernel - Re: [PATCH v9 1/6] arm: arm64: introduce CONFIG_HAVE_MEMBLOCK_PFN

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Date:   Fri, 29 Jun 2018 14:08:07 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     hejianet@...il.com
Cc:     linux@...linux.org.uk, Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Mel Gorman <mgorman@...e.de>, will.deacon@....com,
        mark.rutland@....com, hpa@...or.com,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Gioh Kim <gi-oh.kim@...fitbricks.com>,
        Steven Sistare <steven.sistare@...cle.com>, neelx@...hat.com,
        erosca@...adit-jv.com, Vlastimil Babka <vbabka@...e.cz>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        james.morse@....com, ard.biesheuvel@...aro.org,
        steve.capper@....com, tglx@...utronix.de, mingo@...hat.com,
        gregkh@...uxfoundation.org, kstewart@...uxfoundation.org,
        pombredanne@...b.com, Johannes Weiner <hannes@...xchg.org>,
        kemi.wang@...el.com, ptesarik@...e.com, yasu.isimatu@...il.com,
        aryabinin@...tuozzo.com, nborisov@...e.com,
        Wei Yang <richard.weiyang@...il.com>, jia.he@...-semitech.com
Subject: Re: [PATCH v9 1/6] arm: arm64: introduce CONFIG_HAVE_MEMBLOCK_PFN_VALID

On Thu, Jun 28, 2018 at 10:30 PM Jia He <hejianet@...il.com> wrote:
>
> Make CONFIG_HAVE_MEMBLOCK_PFN_VALID a new config option so it can move
> memblock_next_valid_pfn to generic code file. All the latter optimizations
> are based on this config.
>
> The memblock initialization time on arm/arm64 can benefit from this.
>
> Signed-off-by: Jia He <jia.he@...-semitech.com>

Reviewed-by: Pavel Tatashin <pasha.tatashin@...cle.com>
On Thu, Jun 28, 2018 at 10:30 PM Jia He <hejianet@...il.com> wrote:
>
> Make CONFIG_HAVE_MEMBLOCK_PFN_VALID a new config option so it can move
> memblock_next_valid_pfn to generic code file. All the latter optimizations
> are based on this config.
>
> The memblock initialization time on arm/arm64 can benefit from this.
>
> Signed-off-by: Jia He <jia.he@...-semitech.com>
> ---
>  arch/arm/Kconfig   | 4 ++++
>  arch/arm64/Kconfig | 4 ++++
>  mm/Kconfig         | 3 +++
>  3 files changed, 11 insertions(+)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 843edfd..7ea2636 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -1642,6 +1642,10 @@ config ARCH_SELECT_MEMORY_MODEL
>  config HAVE_ARCH_PFN_VALID
>         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
>
> +config HAVE_MEMBLOCK_PFN_VALID
> +       def_bool y
> +       depends on HAVE_ARCH_PFN_VALID
> +
>  config HAVE_GENERIC_GUP
>         def_bool y
>         depends on ARM_LPAE
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 42c090c..26d75f4 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -778,6 +778,10 @@ config ARCH_SELECT_MEMORY_MODEL
>  config HAVE_ARCH_PFN_VALID
>         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
>
> +config HAVE_MEMBLOCK_PFN_VALID
> +       def_bool y
> +       depends on HAVE_ARCH_PFN_VALID
> +
>  config HW_PERF_EVENTS
>         def_bool y
>         depends on ARM_PMU
> diff --git a/mm/Kconfig b/mm/Kconfig
> index ce95491..2c38080a5 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -137,6 +137,9 @@ config HAVE_MEMBLOCK_NODE_MAP
>  config HAVE_MEMBLOCK_PHYS_MAP
>         bool
>
> +config HAVE_MEMBLOCK_PFN_VALID
> +       bool
> +
>  config HAVE_GENERIC_GUP
>         bool
>
> --
> 1.8.3.1
>