Messages in this thread | | | Date | Thu, 26 May 2022 09:58:42 +0800 | From | Muchun Song <> | Subject | Re: [PATCH v4 2/6] mm: shrinkers: introduce debugfs interface for memory shrinkers |
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On Wed, May 25, 2022 at 01:25:56PM -0700, Roman Gushchin wrote: > This commit introduces the /sys/kernel/debug/shrinker debugfs > interface which provides an ability to observe the state of > individual kernel memory shrinkers. > > Because the feature adds some memory overhead (which shouldn't be > large unless there is a huge amount of registered shrinkers), it's > guarded by a config option (enabled by default). > > This commit introduces the "count" interface for each shrinker > registered in the system. > > The output is in the following format: > <cgroup inode id> <nr of objects on node 0> <nr of objects on node 1>... > <cgroup inode id> <nr of objects on node 0> <nr of objects on node 1>... > ... > > To reduce the size of output on machines with many thousands cgroups, > if the total number of objects on all nodes is 0, the line is omitted. > > If the shrinker is not memcg-aware or CONFIG_MEMCG is off, 0 is > printed as cgroup inode id. If the shrinker is not numa-aware, 0's are > printed for all nodes except the first one. > > This commit gives debugfs entries simple numeric names, which are not > very convenient. The following commit in the series will provide > shrinkers with more meaningful names. > > Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev> > Reviewed-by: Kent Overstreet <kent.overstreet@gmail.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Thanks.
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