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From:   Shakeel Butt <shakeelb@google.com>
Date:   Mon, 8 Mar 2021 13:57:06 -0800
Message-ID: <CALvZod7Cg9x4x8Jmgu6z9LAn0y-1OosnHSUCL_=DcCfgbGThJg@mail.gmail.com>
Subject: Re: [v8 PATCH 11/13] mm: vmscan: don't need allocate
 shrinker->nr_deferred for memcg aware shrinkers
To:     Yang Shi <shy828301@gmail.com>
Cc:     Roman Gushchin <guro@fb.com>, Kirill Tkhai <ktkhai@virtuozzo.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Dave Chinner <david@fromorbit.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Michal Hocko <mhocko@suse.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux MM <linux-mm@kvack.org>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
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On Tue, Feb 16, 2021 at 4:13 PM Yang Shi <shy828301@gmail.com> wrote:
>
> Now nr_deferred is available on per memcg level for memcg aware shrinkers, so don't need
> allocate shrinker->nr_deferred for such shrinkers anymore.
>
> The prealloc_memcg_shrinker() would return -ENOSYS if !CONFIG_MEMCG or memcg is disabled
> by kernel command line, then shrinker's SHRINKER_MEMCG_AWARE flag would be cleared.
> This makes the implementation of this patch simpler.
>
> Acked-by: Vlastimil Babka <vbabka@suse.cz>
> Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
> Acked-by: Roman Gushchin <guro@fb.com>
> Signed-off-by: Yang Shi <shy828301@gmail.com>

Reviewed-by: Shakeel Butt <shakeelb@google.com>