The following commit has been merged into the sched/rt branch of tip:
Commit-ID: 1529bbb6e2619495f146dd519a196b67837fdfa6
Gitweb: https://git.kernel.org/tip/1529bbb6e2619495f146dd519a196b67837fdfa6
Author: John Ogness <john.ogness@linutronix.de>
AuthorDate: Wed, 04 Sep 2024 14:11:35 +02:06
Committer: Petr Mladek <pmladek@suse.com>
CommitterDate: Wed, 04 Sep 2024 15:56:33 +02:00
printk: nbcon: Assign nice -20 for printing threads
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>
Link: https://lore.kernel.org/r/20240904120536.115780-17-john.ogness@linutronix.de
Signed-off-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 9844088..fd12efc 100644
--- a/kernel/printk/nbcon.c
+++ b/kernel/printk/nbcon.c
@@ -1321,6 +1321,12 @@ 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 66cfe7b..afd9266 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -3555,6 +3555,12 @@ 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;
}