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

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Date:   Tue, 24 Jul 2018 00:00:37 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Alex Ghiti <alex@...ti.fr>, 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, 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

Alex Ghiti <alex@...ti.fr> writes:

> Does anyone have any suggestion about those patches ?

Cross compiling it for some non-x86 arches would be a good start :)

There are cross compilers available here:

  https://mirrors.edge.kernel.org/pub/tools/crosstool/


cheers

> 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