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From: Roman Gushchin <guro@fb.com>
To: Muchun Song <songmuchun@bytedance.com>
Cc: <gregkh@linuxfoundation.org>, <rafael@kernel.org>,
	<adobriyan@gmail.com>, <akpm@linux-foundation.org>,
	<hannes@cmpxchg.org>, <mhocko@kernel.org>,
	<vdavydov.dev@gmail.com>, <hughd@google.com>,
	<shakeelb@google.com>, <samitolvanen@google.com>,
	<feng.tang@intel.com>, <neilb@suse.de>, <iamjoonsoo.kim@lge.com>,
	<rdunlap@infradead.org>, <linux-kernel@vger.kernel.org>,
	<linux-fsdevel@vger.kernel.org>, <linux-mm@kvack.org>,
	<cgroups@vger.kernel.org>, Michal Hocko <mhocko@suse.com>
Subject: Re: [PATCH v3 1/7] mm: memcontrol: fix NR_ANON_THPS account
Date: Tue, 8 Dec 2020 17:58:30 -0800	[thread overview]
Message-ID: <20201209015830.GA2385286@carbon.DHCP.thefacebook.com> (raw)
In-Reply-To: <20201208041847.72122-2-songmuchun@bytedance.com>

On Tue, Dec 08, 2020 at 12:18:41PM +0800, Muchun Song wrote:
> The unit of NR_ANON_THPS is HPAGE_PMD_NR already. So it should inc/dec
> by one rather than nr_pages.
> 
> Fixes: 468c398233da ("mm: memcontrol: switch to native NR_ANON_THPS counter")
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
> Acked-by: Michal Hocko <mhocko@suse.com>

Reviewed-by: Roman Gushchin <guro@fb.com>

Thanks!


> ---
>  mm/memcontrol.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index b80328f52fb4..8818bf64d6fe 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5653,10 +5653,8 @@ static int mem_cgroup_move_account(struct page *page,
>  			__mod_lruvec_state(from_vec, NR_ANON_MAPPED, -nr_pages);
>  			__mod_lruvec_state(to_vec, NR_ANON_MAPPED, nr_pages);
>  			if (PageTransHuge(page)) {
> -				__mod_lruvec_state(from_vec, NR_ANON_THPS,
> -						   -nr_pages);
> -				__mod_lruvec_state(to_vec, NR_ANON_THPS,
> -						   nr_pages);
> +				__dec_lruvec_state(from_vec, NR_ANON_THPS);
> +				__inc_lruvec_state(to_vec, NR_ANON_THPS);
>  			}
>  
>  		}
> -- 
> 2.11.0
> 

  reply	other threads:[~2020-12-09  2:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-08  4:18 [PATCH v3 0/7] Convert all THP vmstat counters to pages Muchun Song
2020-12-08  4:18 ` [PATCH v3 1/7] mm: memcontrol: fix NR_ANON_THPS account Muchun Song
2020-12-09  1:58   ` Roman Gushchin [this message]
2020-12-08  4:18 ` [PATCH v3 2/7] mm: memcontrol: convert NR_ANON_THPS account to pages Muchun Song
2020-12-15 13:30   ` Michal Hocko
2020-12-15 13:37     ` [External] " Muchun Song
2020-12-08  4:18 ` [PATCH v3 3/7] mm: memcontrol: convert NR_FILE_THPS " Muchun Song
2020-12-08  4:18 ` [PATCH v3 4/7] mm: memcontrol: convert NR_SHMEM_THPS " Muchun Song
2020-12-08  4:18 ` [PATCH v3 5/7] mm: memcontrol: convert NR_SHMEM_PMDMAPPED " Muchun Song
2020-12-08  4:18 ` [PATCH v3 6/7] mm: memcontrol: convert NR_FILE_PMDMAPPED " Muchun Song
2020-12-08  4:18 ` [PATCH v3 7/7] mm: memcontrol: make the slab calculation consistent Muchun Song
2020-12-08  7:20   ` Pankaj Gupta
2020-12-08  7:53     ` [External] " Muchun Song
2020-12-15 13:35   ` Michal Hocko
2020-12-15 16:21     ` [External] " Muchun Song

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