linux-kernel - Re: [PATCH -V11 5/9] mm/vmscan: add page demotion counter

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Message-ID: <6B46E3AD-1504-4F27-B4D7-10BB27479BE4@nvidia.com>
Date:   Wed, 21 Jul 2021 17:13:56 -0400
From:   Zi Yan <ziy@...dia.com>
To:     Huang Ying <ying.huang@...el.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Yang Shi <shy828301@...il.com>, Wei Xu <weixugc@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        David Rientjes <rientjes@...gle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Greg Thelen <gthelen@...gle.com>,
        Keith Busch <kbusch@...nel.org>
Subject: Re: [PATCH -V11 5/9] mm/vmscan: add page demotion counter

On 21 Jul 2021, at 2:39, Huang Ying wrote:

> From: Yang Shi <yang.shi@...ux.alibaba.com>
>
> Account the number of demoted pages.
>
> Add pgdemote_kswapd and pgdemote_direct VM counters showed in
> /proc/vmstat.
>
> [ daveh:
>    - __count_vm_events() a bit, and made them look at the THP
>      size directly rather than getting data from migrate_pages()
> ]
>
> Link: https://lkml.kernel.org/r/20210715055145.195411-6-ying.huang@intel.com
> Signed-off-by: Yang Shi <yang.shi@...ux.alibaba.com>
> Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
> Signed-off-by: "Huang, Ying" <ying.huang@...el.com>
> Reviewed-by: Yang Shi <shy828301@...il.com>
> Reviewed-by: Wei Xu <weixugc@...gle.com>
> Cc: Michal Hocko <mhocko@...e.com>
> Cc: Zi Yan <ziy@...dia.com>
> Cc: David Rientjes <rientjes@...gle.com>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Oscar Salvador <osalvador@...e.de>
> Cc: Greg Thelen <gthelen@...gle.com>
> Cc: Keith Busch <kbusch@...nel.org>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
>  include/linux/vm_event_item.h | 2 ++
>  mm/vmscan.c                   | 5 +++++
>  mm/vmstat.c                   | 2 ++
>  3 files changed, 9 insertions(+)
>

LGTM. Reviewed-by: Zi Yan <ziy@...dia.com>


—
Best Regards,
Yan, Zi

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