From: John Ogness Date: Wed, 4 Sep 2024 14:11:35 +0206 Subject: [PATCH 53/54] printk: nbcon: Assign nice -20 for printing threads Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz It is important that console printing threads are scheduled shortly after a printk call and with generous runtime budgets. Signed-off-by: John Ogness Reviewed-by: Petr Mladek Link: https://lore.kernel.org/r/20240904120536.115780-17-john.ogness@linutronix.de Signed-off-by: Petr Mladek Signed-off-by: Sebastian Andrzej Siewior --- kernel/printk/nbcon.c | 6 ++++++ kernel/printk/printk.c | 6 ++++++ 2 files changed, 12 insertions(+) --- a/kernel/printk/nbcon.c +++ b/kernel/printk/nbcon.c @@ -1321,6 +1321,12 @@ bool nbcon_kthread_create(struct console 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; } --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3556,6 +3556,12 @@ 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; }