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@xxxxxxxxxxxxx> AuthorDate: Wed, 04 Sep 2024 14:11:35 +02:06 Committer: Petr Mladek <pmladek@xxxxxxxx> 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@xxxxxxxxxxxxx> Reviewed-by: Petr Mladek <pmladek@xxxxxxxx> Link: https://lore.kernel.org/r/20240904120536.115780-17-john.ogness@xxxxxxxxxxxxx Signed-off-by: Petr Mladek <pmladek@xxxxxxxx> --- 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; }
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