[PATCH v2 01/17] sched/debug: Remove unused schedstats

Shrikanth Hegde
2026-04-07T19:21:49Z

nr_migrations_cold, nr_wakeups_passive and nr_wakeups_idle are not
being updated anywhere. So remove them.

These are per process stats. So updating sched stats version isn't
necessary.

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
include/linux/sched.h | 3 ---
kernel/sched/debug.c | 3 ---
2 files changed, 6 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8ec3b6d7d718..1eb3825bcaeb 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -550,7 +550,6 @@ struct sched_statistics {
s64 exec_max;
u64 slice_max;

- u64 nr_migrations_cold;
u64 nr_failed_migrations_affine;
u64 nr_failed_migrations_running;
u64 nr_failed_migrations_hot;
@@ -563,8 +562,6 @@ struct sched_statistics {
u64 nr_wakeups_remote;
u64 nr_wakeups_affine;
u64 nr_wakeups_affine_attempts;
- u64 nr_wakeups_passive;
- u64 nr_wakeups_idle;

#ifdef CONFIG_SCHED_CORE
u64 core_forceidle_sum;
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 74c1617cf652..f8a43fc13564 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -1301,7 +1301,6 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P_SCHEDSTAT(wait_count);
PN_SCHEDSTAT(iowait_sum);
P_SCHEDSTAT(iowait_count);
- P_SCHEDSTAT(nr_migrations_cold);
P_SCHEDSTAT(nr_failed_migrations_affine);
P_SCHEDSTAT(nr_failed_migrations_running);
P_SCHEDSTAT(nr_failed_migrations_hot);
@@ -1313,8 +1312,6 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P_SCHEDSTAT(nr_wakeups_remote);
P_SCHEDSTAT(nr_wakeups_affine);
P_SCHEDSTAT(nr_wakeups_affine_attempts);
- P_SCHEDSTAT(nr_wakeups_passive);
- P_SCHEDSTAT(nr_wakeups_idle);

avg_atom = p->se.sum_exec_runtime;
if (nr_switches)
--
2.47.3