kernel/sched/psi.c: expose pressure metrics on root cgroup

Pressure metrics are already recorded and exposed in procfs for the entire system, but any tool which monitors cgroup pressure has to special case the root cgroup to read from procfs. This patch exposes the already recorded pressure metrics on the root cgroup.

Dan Schatzberg committed 7 years ago

Commit df5ba5b1 parent 0e946823 files · +14 −7Browse files

Showing the changes to include/linux (1 of 3 files). Show all

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include/linux/psi.h+1−0

@@ -12,6 +12,7 @@ struct css_set; · 11 unmodified lines
12	12	#ifdef CONFIG_PSI
13	13
14	14	extern struct static_key_false psi_disabled;
	15	+extern struct psi_group psi_system;
15	16
16	17	void psi_init(void);
17	18

kernel/sched/psi.c: expose pressure metrics on root cgroup

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