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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
	linux-mm@kvack.org, akpm@linux-foundation.org
Cc: joel@joelfernandes.org, linuxppc-dev@lists.ozlabs.org,
	npiggin@gmail.com, kaleshsingh@google.com
Subject: Re: [PATCH v4 8/9] mm/mremap: Allow arch runtime override
Date: Tue, 20 Apr 2021 10:00:47 +0530
Message-ID: <aa3d090c-0785-08b9-3c91-d8c5cf564937@linux.ibm.com> (raw)
In-Reply-To: <87bla9d34m.fsf@mpe.ellerman.id.au>

On 4/20/21 9:22 AM, Michael Ellerman wrote:
> "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> writes:
>> Architectures like ppc64 support faster mremap only with radix
>> translation. Hence allow a runtime check w.r.t support for fast mremap.
>>
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
>> ---
>>   arch/powerpc/include/asm/tlb.h |  6 ++++++
>>   mm/mremap.c                    | 15 ++++++++++++++-
>>   2 files changed, 20 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
>> index 160422a439aa..058918a7cd3c 100644
>> --- a/arch/powerpc/include/asm/tlb.h
>> +++ b/arch/powerpc/include/asm/tlb.h
>> @@ -83,5 +83,11 @@ static inline int mm_is_thread_local(struct mm_struct *mm)
>>   }
>>   #endif
>>   
>> +#define arch_supports_page_tables_move arch_supports_page_tables_move
>> +static inline bool arch_supports_page_tables_move(void)
>> +{
>> +	return radix_enabled();
>> +}
> 
> Not sure it's worth a respin on its own, but page table*s* move is
> slightly strange phrasing.
> 
> arch_supports_move_page_tables() or arch_supports_page_table_move()
> would be more typical.
> 

I will switch to arch_supports_page_table_move()

-aneesh


  reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-14  8:59 [PATCH v4 0/9] Speedup mremap on ppc64 Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 1/9] selftest/mremap_test: Update the test to handle pagesize other than 4K Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 2/9] selftest/mremap_test: Avoid crash with static build Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 3/9] mm/mremap: Use pmd/pud_poplulate to update page table entries Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 4/9] powerpc/mm/book3s64: Fix possible build error Aneesh Kumar K.V
2021-04-20  3:43   ` Michael Ellerman
2021-04-14  8:59 ` [PATCH v4 5/9] powerpc/mm/book3s64: Update tlb flush routines to take a page walk cache flush argument Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 6/9] mm/mremap: Use range flush that does TLB and page walk cache flush Aneesh Kumar K.V
2021-04-20  3:47   ` Michael Ellerman
2021-04-20  4:17     ` Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 7/9] mm/mremap: Move TLB flush outside page table lock Aneesh Kumar K.V
2021-04-14  8:59 ` [PATCH v4 8/9] mm/mremap: Allow arch runtime override Aneesh Kumar K.V
2021-04-20  3:52   ` Michael Ellerman
2021-04-20  4:30     ` Aneesh Kumar K.V [this message]
2021-04-14  8:59 ` [PATCH v4 9/9] powerpc/mm: Enable move pmd/pud Aneesh Kumar K.V

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