Re: [PATCH v6 00/11] hugetlb: Factorize hugetlb architecture primitives

From: Ingo Molnar <mingo@kernel.org>
To: Alexandre Ghiti <alex@ghiti.fr>
Cc: linux-mm@kvack.org, mike.kravetz@oracle.com,
	linux@armlinux.org.uk, catalin.marinas@arm.com,
	will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com,
	ralf@linux-mips.org, paul.burton@mips.com, jhogan@kernel.org,
	jejb@parisc-linux.org, deller@gmx.de, benh@kernel.crashing.org,
	paulus@samba.org, mpe@ellerman.id.au, ysato@users.sourceforge.jp,
	dalias@libc.org, davem@davemloft.net, tglx@linutronix.de,
	mingo@redhat.com, hpa@zytor.com, x86@kernel.org, arnd@arndb.de,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
	linux-mips@linux-mips.org, linux-parisc@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
	sparclinux@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH v6 00/11] hugetlb: Factorize hugetlb architecture primitives
Date: Tue, 7 Aug 2018 11:54:02 +0200	[thread overview]
Message-ID: <20180807095402.GA12200@gmail.com> (raw)
In-Reply-To: <20180806175711.24438-1-alex@ghiti.fr>


* Alexandre Ghiti <alex@ghiti.fr> wrote:

> [CC linux-mm for inclusion in -mm tree]                                          
>                                                                                  
> 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.                                                
>                                                                                  
> This patchset has been compiled on all addressed architectures with              
> success (except for parisc, but the problem does not come from this              
> series).                                                                         
>                                                                                  
> v6:                                                                              
>   - Remove nohash/32 and book3s/32 powerpc specific implementations in
>     order to use the generic ones.                                                        
>   - Add all the Reviewed-by, Acked-by and Tested-by in the commits,              
>     thanks to everyone.                                                          
>                                                                                  
> v5:                                                                              
>   As suggested by Mike Kravetz, no need to move the #include                     
>   <asm-generic/hugetlb.h> for arm and x86 architectures, let it live at          
>   the top of the file.                                                           
>                                                                                  
> 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               | 30 ----------
>  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 |  6 --
>  arch/powerpc/include/asm/book3s/64/pgtable.h |  1 +
>  arch/powerpc/include/asm/hugetlb.h           | 43 ++------------
>  arch/powerpc/include/asm/nohash/32/pgtable.h |  6 --
>  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               | 69 ----------------------
>  include/asm-generic/hugetlb.h                | 88 +++++++++++++++++++++++++++-
>  15 files changed, 135 insertions(+), 394 deletions(-)

The x86 bits look good to me (assuming it's all tested on all relevant architectures, etc.)

Acked-by: Ingo Molnar <mingo@kernel.org>

Thanks,

	Ingo