From: John Ogness <john.ogness@linutronix.de>
Date: Wed, 4 Sep 2024 12:05:35 +0000 (+0206)
Subject: printk: nbcon: Assign nice -20 for printing threads
X-Git-Tag: ceph-for-6.12-rc2~194^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=1529bbb6e2619495f146dd519a196b67837fdfa6;p=ceph-client.git

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>
---

diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c
index 98440889d222..fd12efcc4aed 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 66cfe7b8f95c..afd926611f0f 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;
 }