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@xxxxxxxxx> > Reviewed-by: Kent Overstreet <kent.overstreet@xxxxxxxxx> Acked-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Thanks.
