[PATCH printk v4 16/17] printk: nbcon: Assign nice -20 for printing threads

[John Ogness <john.ogness@linutronix.de>]

It is important that console printing threads are scheduled
shortly after a printk call and with generous runtime budgets.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
---
 kernel/printk/nbcon.c  | 6 ++++++
 kernel/printk/printk.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c
index d3a018919046..32a383c4f62e 100644
--- a/kernel/printk/nbcon.c
+++ b/kernel/printk/nbcon.c
@@ -1312,6 +1312,12 @@ bool nbcon_kthread_create(struct console *con)
 
 	con->kthread = kt;
 
+	/*
+	 * It is important that console printing threads are scheduled
+	 * shortly after a printk call and with generous runtime budgets.
+	 */
+	sched_set_normal(con->kthread, -20);
+
 	return true;
 }
 
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 4220abe86296..ed4a3cb00095 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -3554,6 +3554,12 @@ static bool legacy_kthread_create(void)
 
 	printk_legacy_kthread = kt;
 
+	/*
+	 * It is important that console printing threads are scheduled
+	 * shortly after a printk call and with generous runtime budgets.
+	 */
+	sched_set_normal(printk_legacy_kthread, -20);
+
 	return true;
 }
 
-- 
2.39.2