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Date:   Wed, 1 Jun 2022 12:10:29 +0200
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Subject: Re: [PATCH 3/3] mm: hugetlb_vmemmap: cleanup
 CONFIG_HUGETLB_PAGE_FREE_VMEMMAP*
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To:     Muchun Song <songmuchun@bytedance.com>
Cc:     mike.kravetz@oracle.com, akpm@linux-foundation.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        smuchun@bytedance.com
References: <20220404074652.68024-1-songmuchun@bytedance.com>
 <20220404074652.68024-4-songmuchun@bytedance.com>
 <ba64cd1b-c8ee-a4eb-f0cd-e16c26777d46@redhat.com>
 <Ypc3OquA5MZUl5iw@FVFYT0MHHV2J.googleapis.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
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On 01.06.22 11:54, Muchun Song wrote:
> On Wed, Jun 01, 2022 at 11:32:37AM +0200, David Hildenbrand wrote:
>> On 04.04.22 09:46, Muchun Song wrote:
>>> The word of "free" is not expressive enough to express the feature of optimizing
>>> vmemmap pages associated with each HugeTLB, rename this keywork to "optimeze".
>>> In this patch , cheanup configs to make code more expressive.
>>
>> Nit: why not simply CONFIG_HUGETLB_OPTIMIZE_VMEMMAP if we're touching
>> this already? At least I don't see value in the additional "PAGE" :)
>>
> 
> I thought it keep consistent with CONFIG_HUGETLB_PAGE.  If you think
> CONFIG_HUGETLB_OPTIMIZE_VMEMMAP is a better name, maybe we need to
> another separate patch since this series is already on mm-stable branch.

I see, makes sense then.

>>>
>>> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
>>> ---
>>>  Documentation/admin-guide/kernel-parameters.txt |  4 ++--
>>>  Documentation/admin-guide/mm/hugetlbpage.rst    |  2 +-
>>>  arch/arm64/Kconfig                              |  2 +-
>>>  arch/arm64/mm/flush.c                           |  2 +-
>>>  arch/x86/Kconfig                                |  2 +-
>>>  arch/x86/mm/init_64.c                           |  2 +-
>>>  fs/Kconfig                                      | 16 ++++++++--------
>>>  include/linux/hugetlb.h                         |  2 +-
>>>  include/linux/mm.h                              |  2 +-
>>>  include/linux/page-flags.h                      |  6 +++---
>>>  mm/Makefile                                     |  2 +-
>>>  mm/hugetlb_vmemmap.c                            |  4 ++--
>>>  mm/hugetlb_vmemmap.h                            |  4 ++--
>>>  mm/sparse-vmemmap.c                             |  4 ++--
>>>  14 files changed, 27 insertions(+), 27 deletions(-)
>>>
>>> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
>>> index 56edbe3f458f..89a58ac49d5f 100644
>>> --- a/Documentation/admin-guide/kernel-parameters.txt
>>> +++ b/Documentation/admin-guide/kernel-parameters.txt
>>> @@ -1660,7 +1660,7 @@
>>>  			Format: size[KMG]
>>>  
>>>  	hugetlb_free_vmemmap=
>>
>> We didn't change the parameter name in #2, correct?
>>
> 
> I think this is a interface to users. Is it correct to
> change it?

I guess so ... I was just wanted to confirm that this is still correct :)

-- 
Thanks,

David / dhildenb