This patch enables us to report sched domain generation information.
If DYNAMIC_DEBUG is enabled, issuing the following command
echo "file cpuset.c +p" > /sys/kernel/debug/dynamic_debug/control
and setting loglevel to 8 will allow the kernel to show what scheduling
domain changes are being made.
Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
---
kernel/cgroup/cpuset.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index fb8aa82b..8f586e8 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -820,6 +820,12 @@ static int generate_sched_domains(cpumask_var_t **domains,
}
BUG_ON(nslot != ndoms);
+#ifdef CONFIG_DEBUG_KERNEL
+ for (i = 0; i < ndoms; i++)
+ pr_debug("generate_sched_domains dom %d: %*pbl\n", i,
+ cpumask_pr_args(doms[i]));
+#endif
+
done:
kfree(csa);
--
1.8.3.1
--
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