linux-kernel - Re: [External] Re: [PATCH v23 8/9] mm: memory_hotplug: disable memmap_on_memory when hugetlb_free

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Message-ID: <CAMZfGtVzwA+35az8ARxzVmTnt=pGObJvG=a23_2_7TVptmzN1g@mail.gmail.com>
Date:   Mon, 10 May 2021 18:33:38 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     Oscar Salvador <osalvador@...e.de>
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 ML <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,
        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>,
        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>,
        fam.zheng@...edance.com, zhengqi.arch@...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 v23 8/9] mm: memory_hotplug: disable
 memmap_on_memory when hugetlb_free_vmemmap enabled

On Mon, May 10, 2021 at 6:08 PM Oscar Salvador <osalvador@...e.de> wrote:
>
> On Mon, May 10, 2021 at 11:00:26AM +0800, Muchun Song wrote:
> > diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
> > index 8cc195c4c861..0d7f595ee441 100644
> > --- a/drivers/acpi/acpi_memhotplug.c
> > +++ b/drivers/acpi/acpi_memhotplug.c
> > @@ -15,6 +15,7 @@
> >  #include <linux/acpi.h>
> >  #include <linux/memory.h>
> >  #include <linux/memory_hotplug.h>
> > +#include <linux/hugetlb.h>
> >
> >  #include "internal.h"
>
> Uhm, I am confused.
> Why do we need this here? AFAICS, we do not.
>
> The function is in memory_hotplug.c, and that alrady has that include.
> What am I missing?

You are right. That include is redundant. I will remove it
from acpi_memhotplug.c. Thanks Oscar.

>
>
> --
> Oscar Salvador
> SUSE L3