linux-kernel - Re: [External] Re: [PATCH v17 1/9] mm: memory_hotplug: factor out bootmem core functions to bootmem

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Date:   Thu, 4 Mar 2021 13:50:23 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     Balbir Singh <bsingharora@...il.com>
Cc:     Jonathan Corbet <corbet@....net>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <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>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>, paulmck@...nel.org,
        mchehab+huawei@...nel.org, pawan.kumar.gupta@...ux.intel.com,
        Randy Dunlap <rdunlap@...radead.org>, oneukum@...e.com,
        anshuman.khandual@....com, jroedel@...e.de,
        Mina Almasry <almasrymina@...gle.com>,
        David Rientjes <rientjes@...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>,
        Joao Martins <joao.m.martins@...cle.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>,
        Miaohe Lin <linmiaohe@...wei.com>
Subject: Re: [External] Re: [PATCH v17 1/9] mm: memory_hotplug: factor out
 bootmem core functions to bootmem_info.c

On Thu, Mar 4, 2021 at 12:26 PM Balbir Singh <bsingharora@...il.com> wrote:
>
> On Wed, Mar 03, 2021 at 01:45:00PM +1100, Singh, Balbir wrote:
> > On 26/2/21 12:21 am, Muchun Song wrote:
> > > Move bootmem info registration common API to individual bootmem_info.c.
> > > And we will use {get,put}_page_bootmem() to initialize the page for the
> > > vmemmap pages or free the vmemmap pages to buddy in the later patch.
> > > So move them out of CONFIG_MEMORY_HOTPLUG_SPARSE. This is just code
> > > movement without any functional change.
> > >
> > > Signed-off-by: Muchun Song <songmuchun@...edance.com>
> > > Acked-by: Mike Kravetz <mike.kravetz@...cle.com>
> > > Reviewed-by: Oscar Salvador <osalvador@...e.de>
> > > Reviewed-by: David Hildenbrand <david@...hat.com>
> > > Reviewed-by: Miaohe Lin <linmiaohe@...wei.com>
> > ...
> >
> > > diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c
> > > new file mode 100644
> > > index 000000000000..fcab5a3f8cc0
> > > --- /dev/null
> > > +++ b/mm/bootmem_info.c
> > > @@ -0,0 +1,124 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + *  linux/mm/bootmem_info.c
> > > + *
> > > + *  Copyright (C)
> >
> > Looks like incomplete
> >
> Not that my comment was, I should have said
>
> The copyright looks very incomplete

Yes. Just copied from mm/memory_hotplug.c.
I can improve it in the next version. Thanks.

>
> Balbir Singh.