linux-kernel - Re: [PATCH v20 00/20] per memcg lru lock

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Date:   Wed, 4 Nov 2020 11:59:35 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Alex Shi <alex.shi@...ux.alibaba.com>
Cc:     akpm@...ux-foundation.org, mgorman@...hsingularity.net,
        tj@...nel.org, hughd@...gle.com, khlebnikov@...dex-team.ru,
        daniel.m.jordan@...cle.com, willy@...radead.org, lkp@...el.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, shakeelb@...gle.com,
        iamjoonsoo.kim@....com, richard.weiyang@...il.com,
        kirill@...temov.name, alexander.duyck@...il.com,
        rong.a.chen@...el.com, mhocko@...e.com, vdavydov.dev@...il.com,
        shy828301@...il.com
Subject: Re: [PATCH v20 00/20] per memcg lru lock

On Wed, Nov 04, 2020 at 07:55:39PM +0800, Alex Shi wrote:
> @@ -1380,6 +1383,14 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct pglist_data *pgd
>         return lruvec;
>  }
> 
> +/**
> + * lock_page_lruvec - return lruvec for the locked page.

I would say "lock and return the lruvec for a given page"

> + * @page: the page
> + *
> + * This series functions should be used in either conditions:
> + * PageLRU is cleared or unset
> + * or, page->_refcount is zero

or page is locked

The other changes look good to me, thanks!