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-rw-r--r--include/linux/cgroup-defs.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index ae20dbb885d6..f1b3151ac30b 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -342,6 +342,20 @@ struct cgroup_rstat_cpu {
struct cgroup_base_stat last_bstat;
/*
+ * This field is used to record the cumulative per-cpu time of
+ * the cgroup and its descendants. Currently it can be read via
+ * eBPF/drgn etc, and we are still trying to determine how to
+ * expose it in the cgroupfs interface.
+ */
+ struct cgroup_base_stat subtree_bstat;
+
+ /*
+ * Snapshots at the last reading. These are used to calculate the
+ * deltas to propagate to the per-cpu subtree_bstat.
+ */
+ struct cgroup_base_stat last_subtree_bstat;
+
+ /*
* Child cgroups with stat updates on this cpu since the last read
* are linked on the parent's ->updated_children through
* ->updated_next.