[PATCH v3 2/3] sched/debug: dump domains' level

From: Vitalii Bursov
Date: Wed Apr 03 2024 - 09:31:18 EST


Knowing domain's level exactly can be useful when setting
relax_domain_level or cpuset.sched_relax_domain_level

Usage:
cat /debug/sched/domains/cpu0/domain1/level
to dump cpu0 domain1's level.

Signed-off-by: Vitalii Bursov <vitaly@xxxxxxxxxx>
---
kernel/sched/debug.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 8d5d98a5834d..c1eb9a1afd13 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -425,6 +425,7 @@ static void register_sd(struct sched_domain *sd, struct dentry *parent)

debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops);
debugfs_create_file("groups_flags", 0444, parent, &sd->groups->flags, &sd_flags_fops);
+ debugfs_create_u32("level", 0444, parent, (u32 *)&sd->level);
}

void update_sched_domain_debugfs(void)
--
2.20.1