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printk: nbcon: Assign nice -20 for printing threads

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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>
This commit is contained in:
John Ogness 2024-09-04 14:11:35 +02:06 committed by Petr Mladek
parent 5f53ca3ff8
commit 1529bbb6e2
2 changed files with 12 additions and 0 deletions
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6
kernel/printk/nbcon.c
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@ -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;
}

6
kernel/printk/printk.c
View File

@ -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;
}