linux-kernel - Re: [PATCH -mm 10/21] mm, THP, swap: Support to count THP swapin and its fallback

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Date:   Tue, 17 Apr 2018 14:18:08 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     "Huang, Ying" <ying.huang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Tim Chen <tim.c.chen@...el.com>, Andi Kleen <ak@...ux.intel.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Michal Hocko <mhocko@...e.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Shaohua Li <shli@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Rik van Riel <riel@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Zi Yan <zi.yan@...rutgers.edu>
Subject: Re: [PATCH -mm 10/21] mm, THP, swap: Support to count THP swapin and
 its fallback

On 04/16/18 19:02, Huang, Ying wrote:
> From: Huang Ying <ying.huang@...el.com>
> 
> 2 new /proc/vmstat fields are added, "thp_swapin" and
> "thp_swapin_fallback" to count swapin a THP from swap device as a
> whole and fallback to normal page swapin.
> 
> Signed-off-by: "Huang, Ying" <ying.huang@...el.com>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> Cc: Andrea Arcangeli <aarcange@...hat.com>
> Cc: Michal Hocko <mhocko@...e.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Shaohua Li <shli@...nel.org>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: Minchan Kim <minchan@...nel.org>
> Cc: Rik van Riel <riel@...hat.com>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Cc: Zi Yan <zi.yan@...rutgers.edu>
> ---
>  include/linux/vm_event_item.h |  2 ++
>  mm/huge_memory.c              |  4 +++-
>  mm/page_io.c                  | 15 ++++++++++++---
>  mm/vmstat.c                   |  2 ++
>  4 files changed, 19 insertions(+), 4 deletions(-)
> 

Hi,
Please also update Documentation/vm/transhuge.rst.

Thanks.

-- 
~Randy