linux-kernel - Re: [External] Re: [PATCH v13 02/12] mm: hugetlb: introduce a new config HUGETLB_PAGE_FREE

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Message-ID: <4ab7e425-711f-dad9-6a43-e480d5a92b8a@google.com>
Date:   Tue, 26 Jan 2021 12:13:00 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Muchun Song <songmuchun@...edance.com>
cc:     Randy Dunlap <rdunlap@...radead.org>,
        Jonathan Corbet <corbet@....net>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>, mingo@...hat.com,
        bp@...en8.de, x86@...nel.org, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org,
        Peter Zijlstra <peterz@...radead.org>, viro@...iv.linux.org.uk,
        Andrew Morton <akpm@...ux-foundation.org>, paulmck@...nel.org,
        mchehab+huawei@...nel.org, pawan.kumar.gupta@...ux.intel.com,
        oneukum@...e.com, anshuman.khandual@....com, jroedel@...e.de,
        Mina Almasry <almasrymina@...gle.com>,
        Matthew Wilcox <willy@...radead.org>,
        Oscar Salvador <osalvador@...e.de>,
        Michal Hocko <mhocko@...e.com>,
        "Song Bao Hua (Barry Song)" <song.bao.hua@...ilicon.com>,
        David Hildenbrand <david@...hat.com>,
        HORIGUCHI NAOYA(堀口 直也) 
        <naoya.horiguchi@....com>,
        Xiongchun duan <duanxiongchun@...edance.com>,
        linux-doc@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [External] Re: [PATCH v13 02/12] mm: hugetlb: introduce a new
 config HUGETLB_PAGE_FREE_VMEMMAP

On Tue, 26 Jan 2021, Muchun Song wrote:

> > 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.
> 
> OK. So do you mean just remove the help text here?
> 

Yeah, I'd suggest removing the help text from a non-configurable Kconfig 
option and double checking that its substance is available elsewhere (like 
the giant comment in mm/hugetlb_vmemmap.c).