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From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: Re: [PATCH v1 11/11] mm: memory_hotplug: memory hotremove supports
 thp migration
Date: Thu, 3 Mar 2016 08:40:17 +0000
Message-ID: <20160303084015.GA29281@hori1.linux.bs1.fc.nec.co.jp>
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 <1456990918-30906-12-git-send-email-n-horiguchi@ah.jp.nec.com>
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Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Hugh Dickins <hughd@google.com>, Andrew Morton <akpm@linux-foundation.org>, Dave Hansen <dave.hansen@intel.com>, Andrea Arcangeli <aarcange@redhat.com>, Mel Gorman <mgorman@techsingularity.net>, Michal Hocko <mhocko@kernel.org>, Vlastimil Babka <vbabka@suse.cz>, Pavel Emelyanov <xemul@parallels.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Naoya Horiguchi <nao.horiguchi@gmail.com>

On Thu, Mar 03, 2016 at 04:41:58PM +0900, Naoya Horiguchi wrote:
> This patch enables thp migration for memory hotremove. Stub definition of
> prep_transhuge_page() is added for CONFIG_TRANSPARENT_HUGEPAGE=3Dn.
>=20
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> ---
>  include/linux/huge_mm.h | 3 +++
>  mm/memory_hotplug.c     | 8 ++++++++
>  mm/page_isolation.c     | 8 ++++++++
>  3 files changed, 19 insertions(+)
>=20
> diff --git v4.5-rc5-mmotm-2016-02-24-16-18/include/linux/huge_mm.h v4.5-r=
c5-mmotm-2016-02-24-16-18_patched/include/linux/huge_mm.h
> index 09b215d..7944346 100644
> --- v4.5-rc5-mmotm-2016-02-24-16-18/include/linux/huge_mm.h
> +++ v4.5-rc5-mmotm-2016-02-24-16-18_patched/include/linux/huge_mm.h
> @@ -175,6 +175,9 @@ static inline bool thp_migration_supported(void)
>  #define transparent_hugepage_enabled(__vma) 0
> =20
>  #define transparent_hugepage_flags 0UL
> +static inline void prep_transhuge_page(struct page *page)
> +{
> +}
>  static inline int
>  split_huge_page_to_list(struct page *page, struct list_head *list)
>  {

According to the warnings from kbuild bot, this chunk should come with
patch 8/11 or earlier. I'll fix this.

Thanks,
Naoya Horiguchi=

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