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Date:   Thu, 26 May 2022 11:46:23 +0800
From:   Muchun Song <songmuchun@bytedance.com>
To:     Roman Gushchin <roman.gushchin@linux.dev>
Cc:     Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        Dave Chinner <dchinner@redhat.com>,
        linux-kernel@vger.kernel.org,
        Kent Overstreet <kent.overstreet@gmail.com>,
        Hillf Danton <hdanton@sina.com>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Subject: Re: [PATCH v4 6/6] mm: shrinkers: add scan interface for shrinker
 debugfs
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References: <20220525202600.2910982-1-roman.gushchin@linux.dev>
 <20220525202600.2910982-7-roman.gushchin@linux.dev>
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On Wed, May 25, 2022 at 01:26:00PM -0700, Roman Gushchin wrote:
> Add a scan interface which allows to trigger scanning of a particular
> shrinker and specify memcg and numa node. It's useful for testing,
> debugging and profiling of a specific scan_objects() callback.
> Unlike alternatives (creating a real memory pressure and dropping
> caches via /proc/sys/vm/drop_caches) this interface allows to interact
> with only one shrinker at once. Also, if a shrinker is misreporting
> the number of objects (as some do), it doesn't affect scanning.
> 
> Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>

Acked-by: Muchun Song <songmuchun@bytedance.com>

Thanks.