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Date:   Mon, 25 Jan 2021 10:47:31 -0800 (PST)
From:   David Rientjes <rientjes@google.com>
To:     Muchun Song <songmuchun@bytedance.com>
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Subject: Re: [External] Re: [PATCH v13 02/12] mm: hugetlb: introduce a new
 config HUGETLB_PAGE_FREE_VMEMMAP
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On Mon, 25 Jan 2021, Muchun Song wrote:

> > >> I'm not sure I understand the rationale for providing this help text if
> > >> this is def_bool depending on CONFIG_HUGETLB_PAGE.  Are you intending that
> > >> this is actually configurable and we want to provide guidance to the admin
> > >> on when to disable it (which it currently doesn't)?  If not, why have the
> > >> help text?
> > >
> > > This is __not__ configurable. Seems like a comment to help others
> > > understand this option. Like Randy said.
> >
> > Yes, it could be written with '#' (or "comment") comment syntax instead of as help text.
> 
> Got it. I will update in the next version. Thanks.
> 

I'm not sure that Kconfig is the right place to document functional 
behavior of the kernel, especially for non-configurable options.  Seems 
like this is already served by existing comments added by this patch 
series in the files where the description is helpful.