From: Steve Capper <steve.capper@linaro.org>
To: linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Michal Hocko <mhocko@suse.cz>, Ken Chen <kenchen@google.com>,
Mel Gorman <mgorman@suse.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: Re: [RFC PATCH 9/9] ARM64: mm: THP support.
Date: Wed, 1 May 2013 15:16:14 +0100 [thread overview]
Message-ID: <20130501141613.GA23462@linaro.org> (raw)
In-Reply-To: <1367339448-21727-10-git-send-email-steve.capper@linaro.org>
On Tue, Apr 30, 2013 at 05:30:48PM +0100, Steve Capper wrote:
> Bring Transparent HugePage support to ARM. The size of a
> transparent huge page depends on the normal page size. A
> transparent huge page is always represented as a pmd.
>
> If PAGE_SIZE is 4K, THPs are 2MB.
> If PAGE_SIZE is 64K, THPs are 512MB.
>
> Signed-off-by: Steve Capper <steve.capper@linaro.org>
> ---
> arch/arm64/Kconfig | 3 +++
> arch/arm64/include/asm/pgtable-hwdef.h | 1 +
> arch/arm64/include/asm/pgtable.h | 47 ++++++++++++++++++++++++++++++++++
> arch/arm64/include/asm/tlb.h | 6 +++++
> arch/arm64/include/asm/tlbflush.h | 2 ++
> 5 files changed, 59 insertions(+)
>
[ ... ]
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 4b7a058..06bfbd6 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
[ ... ]
> +#define pmd_modify(pmd,newprot) (__pmd(pmd_val(pmd) | pgprot_val(newprot)))
> +#define set_pmd_at(mm, addr, pmdp, pmd) set_pmd(pmdp, pmd)
Apologies, I have over-simplified (and broke) pmd_modify whilst tidying up this
patch. It should mask off certain bits. I will send out a correction once
PROT_NONE support has been sorted as this will affect this code path too.
--
Steve
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WARNING: multiple messages have this Message-ID (diff)
From: Steve Capper <steve.capper@linaro.org>
To: linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Michal Hocko <mhocko@suse.cz>, Ken Chen <kenchen@google.com>,
Mel Gorman <mgorman@suse.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: Re: [RFC PATCH 9/9] ARM64: mm: THP support.
Date: Wed, 1 May 2013 15:16:14 +0100 [thread overview]
Message-ID: <20130501141613.GA23462@linaro.org> (raw)
Message-ID: <20130501141614.Qu03m1VcVmCKcDggPumDasYJIdliXGCKZNtUaJzIxaQ@z> (raw)
In-Reply-To: <1367339448-21727-10-git-send-email-steve.capper@linaro.org>
On Tue, Apr 30, 2013 at 05:30:48PM +0100, Steve Capper wrote:
> Bring Transparent HugePage support to ARM. The size of a
> transparent huge page depends on the normal page size. A
> transparent huge page is always represented as a pmd.
>
> If PAGE_SIZE is 4K, THPs are 2MB.
> If PAGE_SIZE is 64K, THPs are 512MB.
>
> Signed-off-by: Steve Capper <steve.capper@linaro.org>
> ---
> arch/arm64/Kconfig | 3 +++
> arch/arm64/include/asm/pgtable-hwdef.h | 1 +
> arch/arm64/include/asm/pgtable.h | 47 ++++++++++++++++++++++++++++++++++
> arch/arm64/include/asm/tlb.h | 6 +++++
> arch/arm64/include/asm/tlbflush.h | 2 ++
> 5 files changed, 59 insertions(+)
>
[ ... ]
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 4b7a058..06bfbd6 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
[ ... ]
> +#define pmd_modify(pmd,newprot) (__pmd(pmd_val(pmd) | pgprot_val(newprot)))
> +#define set_pmd_at(mm, addr, pmdp, pmd) set_pmd(pmdp, pmd)
Apologies, I have over-simplified (and broke) pmd_modify whilst tidying up this
patch. It should mask off certain bits. I will send out a correction once
PROT_NONE support has been sorted as this will affect this code path too.
--
Steve
next prev parent reply other threads:[~2013-05-01 14:16 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-30 16:30 [RFC PATCH 0/9] HugeTLB and THP support for ARM64 Steve Capper
2013-04-30 16:30 ` [RFC PATCH 1/9] mm: hugetlb: Copy huge_pmd_share from x86 to mm Steve Capper
2013-04-30 16:30 ` [RFC PATCH 2/9] x86: mm: Remove x86 version of huge_pmd_share Steve Capper
2013-04-30 16:30 ` [RFC PATCH 3/9] mm: hugetlb: Copy general hugetlb code from x86 to mm Steve Capper
2013-04-30 16:30 ` Steve Capper
2013-04-30 16:48 ` Catalin Marinas
2013-04-30 16:48 ` Catalin Marinas
2013-04-30 16:30 ` [RFC PATCH 4/9] x86: mm: Remove general hugetlb code from x86 Steve Capper
2013-04-30 16:30 ` [RFC PATCH 5/9] ARM64: mm: Add support for flushing huge pages Steve Capper
2013-05-01 11:05 ` Will Deacon
2013-05-01 11:05 ` Will Deacon
2013-05-01 11:31 ` Catalin Marinas
2013-05-01 11:31 ` Catalin Marinas
2013-04-30 16:30 ` [RFC PATCH 6/9] ARM64: mm: Restore memblock limit when map_mem finished Steve Capper
2013-04-30 16:30 ` [RFC PATCH 7/9] ARM64: mm: HugeTLB support Steve Capper
2013-04-30 16:30 ` Steve Capper
2013-05-01 11:42 ` Will Deacon
2013-05-01 11:42 ` Will Deacon
2013-05-01 13:04 ` Steve Capper
2013-05-01 16:21 ` Catalin Marinas
2013-05-01 16:21 ` Catalin Marinas
2013-04-30 16:30 ` [RFC PATCH 8/9] ARM64: mm: Introduce MAX_ZONE_ORDER for 64K and THP Steve Capper
2013-04-30 16:30 ` Steve Capper
2013-05-02 10:00 ` Catalin Marinas
2013-05-02 10:00 ` Catalin Marinas
2013-05-02 10:05 ` Steve Capper
2013-05-02 10:05 ` Steve Capper
2013-04-30 16:30 ` [RFC PATCH 9/9] ARM64: mm: THP support Steve Capper
2013-05-01 14:16 ` Steve Capper [this message]
2013-05-01 14:16 ` Steve Capper
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