linux-kernel - Re: [PATCH v4 00/11] hugetlb: Factorize hugetlb architecture primitives

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Date:   Fri, 20 Jul 2018 18:37:51 +0000
From:   Alex Ghiti <alex@...ti.fr>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, tony.luck@...el.com, fenghua.yu@...el.com,
        ralf@...ux-mips.org, paul.burton@...s.com, jhogan@...nel.org,
        jejb@...isc-linux.org, deller@....de, benh@...nel.crashing.org,
        paulus@...ba.org, mpe@...erman.id.au, ysato@...rs.sourceforge.jp,
        dalias@...c.org, davem@...emloft.net, tglx@...utronix.de,
        mingo@...hat.com, hpa@...or.com, x86@...nel.org, arnd@...db.de,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-mips@...ux-mips.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-arch@...r.kernel.org,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: Re: [PATCH v4 00/11] hugetlb: Factorize hugetlb architecture
 primitives

Does anyone have any suggestion about those patches ?

On 07/09/2018 02:16 PM, Michal Hocko wrote:
> [CC hugetlb guys - http://lkml.kernel.org/r/20180705110716.3919-1-alex@ghiti.fr]
>
> On Thu 05-07-18 11:07:05, Alexandre Ghiti wrote:
>> In order to reduce copy/paste of functions across architectures and then
>> make riscv hugetlb port (and future ports) simpler and smaller, this
>> patchset intends to factorize the numerous hugetlb primitives that are
>> defined across all the architectures.
>>
>> Except for prepare_hugepage_range, this patchset moves the versions that
>> are just pass-through to standard pte primitives into
>> asm-generic/hugetlb.h by using the same #ifdef semantic that can be
>> found in asm-generic/pgtable.h, i.e. __HAVE_ARCH_***.
>>
>> s390 architecture has not been tackled in this serie since it does not
>> use asm-generic/hugetlb.h at all.
>> powerpc could be factorized a bit more (cf huge_ptep_set_wrprotect).
>>
>> This patchset has been compiled on x86 only.
>>
>> Changelog:
>>
>> v4:
>>    Fix powerpc build error due to misplacing of #include
>>    <asm-generic/hugetlb.h> outside of #ifdef CONFIG_HUGETLB_PAGE, as
>>    pointed by Christophe Leroy.
>>
>> v1, v2, v3:
>>    Same version, just problems with email provider and misuse of
>>    --batch-size option of git send-email
>>
>> Alexandre Ghiti (11):
>>    hugetlb: Harmonize hugetlb.h arch specific defines with pgtable.h
>>    hugetlb: Introduce generic version of hugetlb_free_pgd_range
>>    hugetlb: Introduce generic version of set_huge_pte_at
>>    hugetlb: Introduce generic version of huge_ptep_get_and_clear
>>    hugetlb: Introduce generic version of huge_ptep_clear_flush
>>    hugetlb: Introduce generic version of huge_pte_none
>>    hugetlb: Introduce generic version of huge_pte_wrprotect
>>    hugetlb: Introduce generic version of prepare_hugepage_range
>>    hugetlb: Introduce generic version of huge_ptep_set_wrprotect
>>    hugetlb: Introduce generic version of huge_ptep_set_access_flags
>>    hugetlb: Introduce generic version of huge_ptep_get
>>
>>   arch/arm/include/asm/hugetlb-3level.h        | 32 +---------
>>   arch/arm/include/asm/hugetlb.h               | 33 +----------
>>   arch/arm64/include/asm/hugetlb.h             | 39 +++---------
>>   arch/ia64/include/asm/hugetlb.h              | 47 ++-------------
>>   arch/mips/include/asm/hugetlb.h              | 40 +++----------
>>   arch/parisc/include/asm/hugetlb.h            | 33 +++--------
>>   arch/powerpc/include/asm/book3s/32/pgtable.h |  2 +
>>   arch/powerpc/include/asm/book3s/64/pgtable.h |  1 +
>>   arch/powerpc/include/asm/hugetlb.h           | 43 ++------------
>>   arch/powerpc/include/asm/nohash/32/pgtable.h |  2 +
>>   arch/powerpc/include/asm/nohash/64/pgtable.h |  1 +
>>   arch/sh/include/asm/hugetlb.h                | 54 ++---------------
>>   arch/sparc/include/asm/hugetlb.h             | 40 +++----------
>>   arch/x86/include/asm/hugetlb.h               | 72 +----------------------
>>   include/asm-generic/hugetlb.h                | 88 +++++++++++++++++++++++++++-
>>   15 files changed, 143 insertions(+), 384 deletions(-)
>>
>> -- 
>> 2.16.2