Re: [BUG] printk/nbcon.c: watchdog BUG: softlockup - CPU#x stuck for 78s

[Sebastian Andrzej Siewior]

On 2024-06-18 13:37:42 [-0400], Derek Barbosa wrote:
> Hi,
Hi,

> We have a modicum of reasonable suspicion to believe that nbcon_reacquire, or
> some other nbcon mechanism *may* be causing such behavior.

Does this help?

diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c
index bb9689f94d302..0813ce88a49c5 100644
--- a/kernel/printk/nbcon.c
+++ b/kernel/printk/nbcon.c
@@ -1119,6 +1119,7 @@ static int nbcon_kthread_func(void *__console)
 		}
 
 		console_srcu_read_unlock(cookie);
+		cond_resched();
 
 	} while (backlog);
 

Sebastian