Re: [resend][bug] low-probability console lockups since 5.19

[John Ogness]

On 2022-09-29, Conor Dooley <conor.dooley@xxxxxxxxxxxxx> wrote:
> I will, possibly tonight but probably not, run the bisection again
> with the threaded printer merge reverted. Hopefully it is not filled
> with conflicts if I go that way...

It might be easier for you to just apply the following patch to run your
tests . This simple patch disables kthread usage.

John Ogness


diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index b095fb5f5f61..9679887c0805 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -3605,6 +3605,10 @@ static int __init printk_activate_kthreads(void)
 {
 	struct console *con;
 
+	/* hack: never activate kthreads */
+	if (!printk_kthreads_available)
+		return 0;
+
 	console_lock();
 	printk_kthreads_available = true;
 	for_each_console(con)