Re: [PATCH v4 6/6] mm: shrinkers: add scan interface for shrinker debugfs

[Muchun Song]

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@xxxxxxxxx>

Acked-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Thanks.