linux-kernel - Re: [PATCH] fs/Kconfig: Make hugetlbfs a menuconfig

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Date:   Fri, 24 Nov 2023 10:37:06 +0800
From:   Muchun Song <muchun.song@...ux.dev>
To:     Randy Dunlap <rdunlap@...radead.org>, Peter Xu <peterx@...hat.com>
Cc:     Peter Xu <peterx@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <songmuchun@...edance.com>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] fs/Kconfig: Make hugetlbfs a menuconfig



> On Nov 24, 2023, at 08:19, Randy Dunlap <rdunlap@...radead.org> wrote:
> 
> BTW:
> 
> On 11/23/23 14:39, Peter Xu wrote:
>> Hugetlb vmemmap default option (HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON)
>> is a sub-option to hugetlbfs, but it shows in the same level as hugetlbfs
>> itself, under "Pesudo filesystems".
>> Make the vmemmap option a sub-option to hugetlbfs, by changing hugetlbfs
>> into a menuconfig.
>> 
>> Cc: Mike Kravetz <mike.kravetz@...cle.com>
>> Cc: Muchun Song <songmuchun@...edance.com>
>> Cc: linux-fsdevel@...r.kernel.org
>> Signed-off-by: Peter Xu <peterx@...hat.com>
>> ---
>> fs/Kconfig | 20 +++++++++++---------
>> 1 file changed, 11 insertions(+), 9 deletions(-)
>> 
>> diff --git a/fs/Kconfig b/fs/Kconfig
>> index fd1f655b4f1f..8636198a8689 100644
>> --- a/fs/Kconfig
>> +++ b/fs/Kconfig
>> @@ -254,7 +254,7 @@ config TMPFS_QUOTA
>> config ARCH_SUPPORTS_HUGETLBFS
>> def_bool n
>> 
>> -config HUGETLBFS
>> +menuconfig HUGETLBFS
>> bool "HugeTLB file system support"
>> depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
>> depends on (SYSFS || SYSCTL)
>> @@ -266,14 +266,7 @@ config HUGETLBFS
>> 
>>  If unsure, say N.
>> 
>> -config HUGETLB_PAGE
>> - def_bool HUGETLBFS
>> -
>> -config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
>> - def_bool HUGETLB_PAGE
>> - depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
>> - depends on SPARSEMEM_VMEMMAP
>> -
>> +if HUGETLBFS
>> config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
>> bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
>> default n
>> @@ -282,6 +275,15 @@ config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
>>  The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
> 
> Is this small 'v'            ^ a typo?

Yes. Thanks for pointing it out. Although it is not related to this
patch, but it will be nice for me to carry this tiny typo fix. Hi,
Peter, would you like help me do this?

Thanks.